Idaho

Highway Safety Improvement Program

2015 Annual Report

Prepared by: ID
ii

Disclaimer

Protection of Data from Discovery & Admission into Evidence

23 U.S.C. 148(h)(4) states “Notwithstanding any other provision of law, reports, surveys, schedules, 

lists, or data compiled or collected for any purpose relating to this section [HSIP], shall not be 

subject to discovery or admitted into evidence in a Federal or State court proceeding or considered 

for other purposes in any action for damages arising from any occurrence at a location identified or 

addressed in the reports, surveys, schedules, lists, or other data.” 

23 U.S.C. 409 states “Notwithstanding any other provision of law, reports, surveys, schedules, lists, 

or data compiled or collected for the purpose of identifying, evaluating, or planning the safety 

enhancement of potential accident sites, hazardous roadway conditions, or railway-highway 

crossings, pursuant to sections 130, 144, and 148 of this title or for the purpose of developing any 

highway safety construction improvement project which may be implemented utilizing Federal-aid 

highway funds shall not be subject to discovery or admitted into evidence in a Federal or State 

court proceeding or considered for other purposes in any action for damages arising from any 

occurrence at a location mentioned or addressed in such reports, surveys, schedules, lists, or data.”
iii

Table of Contents

Disclaimer...................................................................................................................................................... ii

Executive Summary....................................................................................................................................... 1

Introduction .................................................................................................................................................. 2

Program Structure ........................................................................................................................................ 2

Program Administration ........................................................................................................................... 2

Program Methodology.............................................................................................................................. 7

Progress in Implementing Projects............................................................................................................. 12

Funds Programmed............................................................................................................................. 12

General Listing of Projects.................................................................................................................. 15

Progress in Achieving Safety Performance Targets .................................................................................... 30

Overview of General Safety Trends........................................................................................................ 30

Application of Special Rules.................................................................................................................... 44

Assessment of the Effectiveness of the Improvements (Program Evaluation) ..........................................46

SHSP Emphasis Areas.............................................................................................................................. 48

Groups of similar project types............................................................................................................... 53

Systemic Treatments............................................................................................................................... 58

Project Evaluation................................................................................................................................... 64

Glossary....................................................................................................................................................... 66
2015 Idaho Highway Safety Improvement Program

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Executive Summary

The Idaho Transportation Department (ITD) continues to work on enhancing the Highway Safety 

Improvement Program (HSIP) for all public roadways in Idaho. ITD uses data from the Highway Safety 

Corridor Analysis (HSCA) to identify high priority corridors. ITD has started using the Transportation 

Economic Development Impact System (TREDIS) to evaluate HSIP eligibility for all projects nominated for 

FY20 and beyond. At the local level, work continues by the Idaho Local Highway Technical Advisory 

Council (LHTAC) to plan and prioritize highway safety projects at the local level. LHTAC continues to 

enhance their process based on the fatal and serious injuries to determine what jurisdiction have 

priority for HSIP funding.

Finally, ITD continues the use of HSIP funds for the behavior programs. This is an effective use of the 

money as Idaho continues to balance the safety program by utilizing the contributions of engineering, 

education, enforcement and emergency response. 
2015 Idaho Highway Safety Improvement Program

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Introduction

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program 

with the purpose of achieving a significant reduction in fatalities and serious 

injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are 

required to report annually on the progress being made to advance HSIP 

implementation and evaluation efforts. The format of this report is consistent 

with the HSIP MAP-21 Reporting Guidance dated February 13, 2013 and consists 

of four sections: program structure, progress in implementing HSIP projects, 

progress in achieving safety performance targets, and assessment of the 

effectiveness of the improvements. 

Program Structure

Program Administration

How are Highway Safety Improvement Program funds allocated in a State? 

Central

District

Other

Describe how local roads are addressed as part of Highway Safety Improvement Program.

Currently local roads are being addressed by the following resolution that was implemented by ITD in 

August of 2010.

WHEREAS, on August 10, 2005 the Safe, Accountable, Flexible, Efficient Transportation Equity Act – a 

Legacy for Users (SAFETEA-LU) created the core Highway Safety Improvement Program (HSIP) for 

utilization by the states; and WHEREAS, Idaho shall develop, implement, and evaluate on an annual basis 

a HSIP that has the overall objective of significantly reducing the occurrence of and the potential for 

fatalities and serious injuries resulting from crashes on all public roads; and WHEREAS, discussions have 
2015 Idaho Highway Safety Improvement Program

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been held with the Local Highway Technical Assistance Council (LHTAC) regarding the application of the 

HSIP to the local roads level in order to meet the intent of SAFETEA-LU; and WHEREAS, it is recognized 

that the majority of the local highway system does not have the exposure (volumetric) data in order to 

perform an equitable analysis to determine appropriate safety project selection on a statewide basis. 

NOW THEREFORE BE IT RESOLVED, that the Idaho Transportation Department supports the allocation of 

a portion of HSIP funding to LHTAC in order to fulfill the intent of SAFETEA-LU; and BE IT FURTHER 

RESOLVED, that the Department shall accomplish the expansion of the HSIP to the local level by: 1) 

Working with LHTAC to analyze existing crash data to determine the top crash locations based on 

frequency and severity recognizing this methodology is acceptable to the Federal Highway 

Administration. 2) Not limiting HSIP funding only to the state highway system. 3) Establishment of the 

Safe Highway and Facilities Team to evaluate and balance the HSIP. LHTAC would be Granted a seat on 

this team and the Districts and LHTAC would be responsible for individual project selection and 

management of their projects and associated funds within the HSIP. 4) Requiring LHTAC to follow all the 

HSIP criteria as established by FHWA. This would include the instruction given in the Capital Investment 

Program update for the latest Statewide Transportation Improvement Program. 5) Supporting and 

assisting where possible LHTAC in the establishment of a program for the collection of exposure 

(volumetric) data to support this program and to further meet the requirements of SAFETEA-LU. This 

includes a local road base map. Once local exposure data can be determined and collected and the local 

road base map is complete, proportional distribution of funding can be better refined and incorporated 

into the HSIP. In accordance with the resolution, a formula was created to determine the proportion of 

the HSIP funding that will be distributed for the state highway system and for the local system. This 

formula is based on road lane mileage, average daily traffic counts and the percentage of fatalities and 

serious injuries on each system. The distributionof funding is reflected in the Statewide Transportation 

Improvement Program approved by the ITD board. Funding will begin with the Federal Fiscal Year 2014.

About 40% of the HSIP funding is designated for the local roads. The local highway technical assistance 

council (LHTAC) is currently evaluating the local road system and soliciting bids from local highway 

districts for projects. Additional money was transferred to the HSIP program thru the 164 penalty 

transfer. None of this 5.5 million was used for local roads so the actual % for 2014 was 21%.

Item #3 in the policy discusses having a team to evaluate and balance the HSIP. This team was briefly in 

existence but now has been changed. The new procedure is addressed in Chief Operations Officer 

Memo 2. The following information is directly from the memo: 

• Projects must be consistent with the strategies in the SHSP

• Projects align with the project criteria outlined in MAP-21

• Projects must be safety data utilized.

Projects are required to correct or improve highway safety in an identified highway safety corridor, 

specific location or address highway safety problem utilizing a systematic approach. The Districts and 
2015 Idaho Highway Safety Improvement Program

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the Local Highway Technical Assistance Council (LHTAC) are responsible to scope and develop safety 

projects for insertion into the HSIP. Projects will be combined by the Office of Transportation 

Investment (OTI) for review and final acceptance by the Division of Highways. A copy of the memo is 

attached for reference. 

Item #5 in the policy addresses establishing a program to help the LHTAC collect volume data. Although 

there has been some informal discussion on this, nothing formal has been done at this time.

Identify which internal partners are involved with Highway Safety Improvement Program planning. 

Design

Planning

Maintenance

Operations

Governors Highway Safety Office

Other: Other-Office of Highway Safety

Other: Other-Local Highway Technical Assistance Council

Briefly describe coordination with internal partners. 

Program Features:

The primary features of the HSIP include the requirement for a comprehensive, data utilized, SHSP that 

defines State safety goals and describes a program of strategies to improve safety. To obligate HSIP 

funds Idaho has developed and implemented a Strategic Highway Safety Plan (SHSP) that outlines 

strategies to address identified safety problems, and evaluate the progress on a regular basis.

Idaho has updated the SHSP and the latest verson was approved by the Idaho Transportation Board 

and signed by Director Ness on April 10, 2013. This meets the requirements of MAP-21. Work has 

started with FHWA (pilot project) on evaluating the SHSP and this project should be completed by the 

end of 2014.
2015 Idaho Highway Safety Improvement Program

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HSIP Project Identification:

Idaho generated Chief Operations Officer Memo 2 to the attention of the District Engineers for the 

purpose to outline management of the HSIP. The primary instruction is:

1. Projects must be consistent with the strategies in the SHSP

2. Projects align with the project criteria outlined in MAP-21

3. Projects must be safety data utilized.

Projects are required to correct or improve highway safety in an identified highway safety corridor, 

specific location or address highways safety problems utilizing a systemic approach. The Districts and 

the Local Highway Technical Assistance Council (LHTAC) are responsible to scope and develop safety 

projects for insertion into the HSIP. Projects will be combined by the Office of Transportation 

Investment (OTI) for review and final acceptance by the Division of Highways. A copy of the memo is 

attached for reference.

HSIP Management:

The Office of Highway Safety will review the defined highway safety corridors after previous years 

crash data is published to update and again in late spring to balance the program prior to submission 

to OTI for inclusion into the STIP.

Identify which external partners are involved with Highway Safety Improvement Program planning. 

Metropolitan Planning Organizations

Governors Highway Safety Office

Local Government Association

Other: Other-Local Highway Technical Assistance Council-representing all local highway districts

Identify any program administration practices used to implement the HSIP that have changed since 

the last reporting period.

Multi-disciplinary HSIP steering committee
2015 Idaho Highway Safety Improvement Program

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Other: Other-ITD has started using the Transportation Economic Deployment Impact System to 

evaluate HSIP eligibility for all projects nominated for FY20 and beyond. The emphasis will be on 

projects that reduce fatal and serious injury crashes.

Describe any other aspects of Highway Safety Improvement Program Administration on which you 

would like to elaborate.

Below is an excerpt from Idaho's FY 15 Program Update Document. It shows the emphasis on a 

data driven approach and alignment with the SHSP.

A “Highway Safety Improvement Project” includes strategies, activities, and projects on a public road that 

are consistent with a SHSP and

• Correct or improve a hazardous road location or feature; or

• Address a highway safety problem.

Data-driven process: 

Highway safety improvement projects must be identified on the basis of crash experience, crash potential, 

crash rate, or other data-supported means. (23 USC 148(c)(2)(B)). The general framework for the 

identification and analysis of highway safety problems and counter-measure opportunities is defined in 23 

U.S.C. 148(c)(2). This framework is consistent with general roadway safety management practices in that 

States should:

• Identify safety problems either through a site analysis or systemic approach;

• Identify countermeasures to address those problems;

• Prioritize projects for implementation; and

• Evaluate projects to determine their effectiveness.
2015 Idaho Highway Safety Improvement Program

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The Idaho Transportation Department’s use of the Highway Safety Corridor planning and prioritization 

process should be utilized to identify locations for highway safety projects.

Program Methodology

Select the programs that are administered under the HSIP. 

Median Barrier Intersection Safe Corridor

Horizontal Curve Bicycle Safety Rural State Highways

Skid Hazard Crash Data Red Light Running Prevention

Roadway Departure Low-Cost Spot Improvements Sign Replacement And 

Improvement

Local Safety Pedestrian Safety Right Angle Crash

Left Turn Crash Shoulder Improvement Segments

Other: Other-Highway Safety 

Corridor

Program: Other-Highway Safety Corridor

Date of Program Methodology: 1/1/2013

 

What data types were used in the program methodology? 

Crashes Exposure Roadway

All crashes Traffic Median width

Fatal crashes only Volume Horizontal curvature

Fatal and serious injury 

crashes only

Population Functional classification
2015 Idaho Highway Safety Improvement Program

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Other Lane miles Roadside features

Other Other 

What project identification methodology was used for this program? 

Crash frequency

Expected crash frequency with EB adjustment

Equivalent property damage only (EPDO Crash frequency)

EPDO crash frequency with EB adjustment

Relative severity index

Crash rate

Critical rate

Level of service of safety (LOSS)

Excess expected crash frequency using SPFs

Excess expected crash frequency with the EB adjustment

Excess expected crash frequency using method of moments

Probability of specific crash types

Excess proportions of specific crash types

Other 

Are local roads (non-state owned and operated) included or addressed in this program?

Yes

No

How are highway safety improvement projects advanced for implementation?

Competitive application process
2015 Idaho Highway Safety Improvement Program

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selection committee

Other 

Select the processes used to prioritize projects for implementation. For the methods selected, indicate 

the relative importance of each process in project prioritization. Enter either the weights or numerical 

rankings. If weights are entered, the sum must equal 100. If ranks are entered, indicate ties by giving 

both processes the same rank and skip the next highest rank (as an example: 1, 2, 2, 4).

Relative Weight in Scoring

Rank of Priority Consideration

Ranking based on B/C 1

Available funding

Incremental B/C

Ranking based on net benefit

Other 

What proportion of highway safety improvement program funds address systemic improvements? 

20

Highway safety improvement program funds are used to address which of the following systemic 

improvements?

Cable Median Barriers Rumble Strips

Traffic Control Device Rehabilitation Pavement/Shoulder Widening

Install/Improve Signing Install/Improve Pavement Marking and/or 

Delineation
2015 Idaho Highway Safety Improvement Program

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Upgrade Guard Rails Clear Zone Improvements

Safety Edge Install/Improve Lighting

Add/Upgrade/Modify/Remove Traffic Signal Other 

What process is used to identify potential countermeasures? 

Engineering Study

Road Safety Assessment

Other: Other-Highway Safety Corridor Analysis process

Identify any program methodology practices used to implement the HSIP that have changed since the 

last reporting period.

Highway Safety Manual

Road Safety audits

Systemic Approach

Other: Other-No Changes
2015 Idaho Highway Safety Improvement Program

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Describe any other aspects of the Highway Safety Improvement Program methodology on which you 

would like to elaborate. 

There is nothing to elaborate on at this time.
2015 Idaho Highway Safety Improvement Program

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Progress in Implementing Projects

Funds Programmed

Reporting period for Highway Safety Improvement Program funding.

Calendar Year

State Fiscal Year

Federal Fiscal Year

Enter the programmed and obligated funding for each applicable funding category.

Funding Category Programmed* Obligated

HSIP (Section 148) 13753265 84 % 11673422 93 %

HRRRP (SAFETEA-LU) 1711929 10 % 0 0 %

HRRR Special Rule

Penalty Transfer -

Section 154

Penalty Transfer –

Section 164

Incentive Grants - 

Section 163

Incentive Grants 

(Section 406)

Other Federal-aid 

Funds (i.e. STP, NHPP)

State and Local Funds
2015 Idaho Highway Safety Improvement Program

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Other HSIP Safetea-Lu 

Extension

871841 5 % 837199.33 7 %

Totals 16337035 100% 12510621.33 100%

How much funding is programmed to local (non-state owned and maintained) safety projects? 

$3,310,166.00

How much funding is obligated to local safety projects?

$3,310,166.00

How much funding is programmed to non-infrastructure safety projects? 

$1,000,000.00

How much funding is obligated to non-infrastructure safety projects?

$1,000,000.00

How much funding was transferred in to the HSIP from other core program areas during the reporting 
2015 Idaho Highway Safety Improvement Program

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period?

$0.00

How much funding was transferred out of the HSIP to other core program areas during the reporting 

period? 

$0.00

Discuss impediments to obligating Highway Safety Improvement Program funds and plans to 

overcome this in the future.

We currently do not have an established process for predicting benefits on projects. In the future, ITD 

plans to use TREDIS to calculate benefits on projects before they go into the HSIP program. The project 

data will be analyzed and approved before it is time to obligate funds.

Describe any other aspects of the general Highway Safety Improvement Program implementation 

progress on which you would like to elaborate.

ITD is currently obligating the funds for both state system and local system projects. One minor 

impediment is ensuring that data is available for analysis to ensure the projects are chosen using a data 

assisted method. The Highway Safety Corridor Analysis process can take time and resources that are not 

always available to produce the lists of possible projects to be evaluated. ITD continues working on 

automating as much of our HSCA process as possible to help reduce the time needed. In the past, 

money has been transferred out of the HSIP into other programs. This will not be a problem in future 

years as the Districts and LHTAC will review the projects currently in the ITIP and take credit for work 

items that would qualify for HSIP funding.
2015 Idaho Highway Safety Improvement Program

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General Listing of Projects

List each highway safety improvement project obligated during the reporting period. 

Project Improvement Category Outp

ut 

HSIP 

Cost

Total 

Cost

Fundin

g 

Catego

ry

Functional 

Classificat

ion

AADT Spee

d

Roadwa

y 

Owners

hip

Relationship to 

SHSP

Emphasis 

Area

Strate

gy

SH 5, 4TH ST 

TO JCT SH 3, ST 

MARIES 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 25000

0

16990

00

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

5507 25 State 

Highway 

Agency

Intersecti

ons

SH 41, JCT SH 

53 TO JCT US 

2, SPIRIT 

LAKE 

Alignment Vertical 

alignment or elevation 

change

0 27000 15070

00

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

0 0 State 

Highway 

Agency

Roadway 

Departure

I 84, FY15 D3 

PAVEMENT 

STRIPING 

Roadway delineation 

Longitudinal pavement 

markings - remarking

0 31165

6

31827

2

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Lane 

Departure

STATE, FY15 

D3 SIGN 

UPGRADES 

Roadway signs and traffic 

control Sign sheeting -

upgrade or replacement

0 15892

8

19892

8

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

intersecti

ons and 

lane 

departure

I 84, FY15 D4 

PAVEMENT 

Roadway delineation 

Longitudinal pavement 

0 37733

5

38933

5

HSIP 

(Sectio

variable 0 0 State 

Highway 

Lane 

Departure
2015 Idaho Highway Safety Improvement Program

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STRIPING markings - remarking n 148) Agency

STATE, FY15 

D4 

GUARDRAIL 

UPGRADE 

Roadside Barrier- metal 0 21525

7

30425

7

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Roadway 

Departure

STATE, FY15 

D5 

PAVEMENT 

STRIPING 

Roadway delineation 

Longitudinal pavement 

markings - remarking

0 65973

0

69973

0

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Lane 

Departure

I 15, FY15 D6 

PAVEMENT 

STRIPING 

Roadway delineation 

Longitudinal pavement 

markings - remarking

0 35511

1

36011

1

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Lane 

Departure

STATE, FY15 

BEHAVORIAL 

SAFETY 

Non-infrastructure Noninfrastructure - other0 10000

00

10000

00

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Impaired, 

Aggressiv

e, 

Seatbelt, 

Youth, 

Distracted

US 95, 

FREEZE RD & 

BEPLATE RD 

TURN BAYS, 

LATAH CO 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 11611

00

13911

00

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

3129 60 State 

Highway 

Agency

Intersecti

ons

STATE, FY15 

D3 

GUARDRAIL 

Roadside Barrier- metal 0 15313

2

19313

2

HSIP 

(Sectio

variable 0 0 State 

Highway 

Roadway 

Departure
2015 Idaho Highway Safety Improvement Program

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UPGRADE n 148) Agency

US 20, JCT SH 

75, 

TIMMERMAN 

STUDY 

Non-infrastructure 

Transportation safety 

planning

0 24415

7

46842

7

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

0 0 State 

Highway 

Agency

intersecti

on 

SH 39, 

TREGO RD, 

LEFT TURN 

LANE EB, 

BINGHAM CO 

Intersection geometry 

Auxiliary lanes - add leftturn lane

0 10000 39900

0

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

0 0 State 

Highway 

Agency

Intersecti

ons

I 90, FY16 D1 

GUARDRAIL 

REPLACEME

NT 

Roadside Barrier- metal 0 57467

2

60000

0

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Roadway 

Departure

STC-4771, 

CAVENDISH 

HWY SAFETY 

IMPR, 

CLEARWATE

R CO 

Roadside Barrier- metal 0 37400

0

43400

0

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

430 0 County 

Highway 

Agency

Roadway 

Departure

STATE, FY16 

D3 

GUARDRAIL 

UPGRADE 

Roadside Barrier - other 0 30905 89790

5

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Roadway 

Departure

SH 55, INT 

KARCHER RD 

Intersection geometry 

Intersection geometrics -

0 31830 40727 HSIP 

(Sectio

Rural 

Principal 

15356 55 State 

Highway 

Intersecti
2015 Idaho Highway Safety Improvement Program

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& INDIANA 

AVE, CANYON 

CO 

miscellaneous/other/unsp

ecified

0 33 n 148) Arterial -

Other

Agency ons

SH 8, MILL 

RD 

TURNBAY, 

LATAH CO 

Intersection geometry 

Auxiliary lanes -

miscellaneous/other/unsp

ecified

0 50000 59780

2

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

5202 45 State 

Highway 

Agency

Intersecti

ons

US 93, 400 S 

ROAD, 

JEROME CO 

Roadway Roadway - other 0 42200

0

75400

00

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

6760 55 State 

Highway 

Agency

Lane 

Departure

US 95, LAKE 

RD & GREEN 

CR RD 

TURNBAYS, 

IDAHO CO 

Intersection geometry 

Auxiliary lanes -

miscellaneous/other/unsp

ecified

0 35000 30010

7

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

3000 65 State 

Highway 

Agency

Intersecti

ons

STC-2722, 

4100 N 

SAFETY 

IMPR, BUHL 

HD 

Roadway Roadway 

widening - travel lanes

0 10827

3

13127

3

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

1301 0 Other 

Local 

Agency

Lane 

Departure

STATE, 

COMMERCIA

L 

WGT/SAFETY 

COMPLIANCE 

STATION, PH 

Non-infrastructure Noninfrastructure - other0 86845

0

12184

50

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

0 0 State 

Highway 

Agency

Commerci

al
2015 Idaho Highway Safety Improvement Program

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3 

STATE, FY15 

D5 

TURNBAYS 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 14285

59

17185

59

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Intersecti

ons

SH 53, N 

PLEASANTVI

EW RD 

TURNBAYS, 

HAUSER 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 39988

6

41988

6

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

8471 55 State 

Highway 

Agency

Intersecti

ons

I 90, 

GOVERNMEN

T WAY 

UPASS, 

COEUR 

D'ALENE 

Roadway Roadway 

widening - travel lanes

0 10000

0

76250

0

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Interstate

32249 65 State 

Highway 

Agency

Lane 

Departure

LOCAL, 

BONNER CO 

SAFETY 

EDGELINE 

MARKINGS 

Roadway delineation 

Roadway delineation -

other

0 16559

5

16759

5

HSIP 

(Sectio

n 148)

Rural 

Local 

Road or 

Street

0 0 County 

Highway 

Agency

Lane 

Departure

LOCAL, POST 

FALLS 

SIGNAL 

TIMING 

Intersection traffic control 

Modify traffic signal 

timing - general retiming

0 36000 36000 HSIP 

(Sectio

n 148)

Urban 

Local 

Road or 

Street

0 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons
2015 Idaho Highway Safety Improvement Program

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SMA-7555, 

INT MULLAN 

AVE & IDAHO 

ST, POST 

FALLS 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 84609 84609 HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

16000 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons

STC-5790, 

BOTTLE BAY 

RD SAFETY 

AUDIT, 

BONNER CO 

Non-infrastructure Road 

safety audits

0 33000 33000 HSIP 

(Sectio

n 148)

Rural 

Minor 

Collector

1386 0 County 

Highway 

Agency

intersecti

ons and 

lane 

departure

STC-5745, E 

FERNAN 

LAKE RD 

SAFETY 

IMPROVEME

NTS 

Roadway delineation 

Longitudinal pavement 

markings - new

0 60000 24900

0

HSIP 

(Sectio

n 148)

Rural 

Minor 

Collector

447.28

05

0 Other 

Local 

Agency

Lane 

Departure

SH 6, OLD 

POTLATCH 

MILL RD TO 

PRINCETON 

FLATS 

Roadway Roadway 

widening - travel lanes

0 10000

0

17400

00

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

2541 0 State 

Highway 

Agency

Lane 

Departure

SMA-7384, 

SIGNALIZED 

INT SAFETY 

IMPROVEME

NTS, 

LEWISTON 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 86966 87966 HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

16000 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons
2015 Idaho Highway Safety Improvement Program

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OFFSYS, 

WEBB RIDGE 

RD; WEBB RD 

TO FLAT 

IRON RD 

Roadway Roadway 

widening - travel lanes

0 67000 20400

0

HSIP 

(Sectio

n 148)

Urban 

Local 

Road or 

Street

0 0 County 

Highway 

Agency

Lane 

Departure

OFFSYS, 

DENT 

BRIDGE RD, 

CLEARWATE

R CO 

Roadside Barrier- metal 0 24560

2

30560

2

HSIP 

(Sectio

n 148)

variable 0 0 County 

Highway 

Agency

Roadway 

Departure

SMA-7384, 

INT THAIN 

RD AND 

GRELLE AVE, 

LEWISTON 

Intersection traffic control 

Intersection traffic control 

- other

0 44000

0

47600

0

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

10000 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons

SH 72, JCT US 

30, PAYETTE 

CO 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 16000

0

69600

0

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

2550 55 State 

Highway 

Agency

Intersecti

ons

LOCAL, ACHD 

SIGNAL 

TIMING PLAN 

UPDATE ON 9 

CORRIDORS 

Intersection traffic control 

Modify traffic signal 

timing - general retiming

0 19200

0

19300

0

HSIP 

(Sectio

n 148)

variable 0 0 Other 

Local 

Agency

Intersecti

ons

LOCAL, HIGH 

ACCIDENT 

WARNING 

Roadway signs and traffic 

control Roadway signs 

0 17894

6

21394

6

HSIP 

(Sectio

variable 0 0 Other 

Local 

intersecti

ons and 
2015 Idaho Highway Safety Improvement Program

22

SIGNS, 

CANYON HD 

#4 

and traffic control - other n 148) Agency lane 

departure

SMA-8353, 

16TH AVE 

SIGNAL 

TIMING, 

NAMPA 

Intersection traffic control 

Modify traffic signal 

timing - general retiming

0 25679

4

25679

4

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

14152 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons

SMA-8323, 

GREENHURS

T RD 

SIGNALS, 

NAMPA 

Intersection traffic control 

Intersection traffic control 

- other

0 59000 39800

0

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

10696 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons

US 93, 200 

NORTH RD, 

JEROME CO 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 5000 68400

0

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

5142 65 State 

Highway 

Agency

Intersecti

ons

US 30, E 4000 

NORTH RD, 

TWIN FALLS 

CO 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 54000 59000

0

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

5344 60 State 

Highway 

Agency

Intersecti

ons

STATE, FY18 

D4 SIGNAL 

UPGRADES 

Intersection traffic control 

Modify traffic signal -

miscellaneous/other/unsp

ecified

0 5000 86673

0

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Intersecti

ons
2015 Idaho Highway Safety Improvement Program

23

SMA 36, US 

30 & 3900N 

FLASHING 

BEACONS, 

TWIN FALLS 

CO 

Intersection traffic control 

Intersection flashers - add 

miscellaneous/other/unsp

ecified

0 33000 34000 HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

1226 0 Other 

Local 

Agency

Intersecti

ons

STC-2810, 

GANNETT 

PICABO RD 

SAFETY 

AUDIT, 

BLAINE CO 

Non-infrastructure Road 

safety audits

0 41869 42869 HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

1226 0 County 

Highway 

Agency

Intersecti

ons

STC-2755, 

200 N RD; 

500 W TO US 

93, JEROME 

CO 

Roadway signs and traffic 

control Roadway signs 

and traffic control - other

0 17000 17000 HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

328 0 Other 

Local 

Agency

intersecti

ons and 

lane 

departure

STC-2713, 

3700 N RD 

INTERSECTIO

NS; US 93 TO 

KIMBERLY 

Roadway signs and traffic 

control Roadway signs 

and traffic control - other

0 18000 18000 HSIP 

(Sectio

n 148)

variable 0 0 Other 

Local 

Agency

Intersecti

ons

I 15 B, E 

ALAMEDA RD 

& 

YELLOWSTO

NE AVE 

Access management 

Median crossover -

unspecified

0 50000 13120

00

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

23936 35 State 

Highway 

Agency

intersecti

on
2015 Idaho Highway Safety Improvement Program

24

MEDIANS 

US 91, INT 

HANSEN LN, 

BLACKFOOT 

Intersection geometry 

Auxiliary lanes -

miscellaneous/other/unsp

ecified

0 65000 69300

0

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

4000 55 State 

Highway 

Agency

Intersecti

ons

STC-1701, 

HOLBROOK -

STONE RD 

DELINEATOR

S, ONEIDA CO 

Roadway delineation 

Longitudinal pavement 

markings - remarking

0 7000 7000 HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

110 0 Other 

Local 

Agency

Lane 

Departure

OFFSYS, OLD 

HWY 191; 

UTAH LN TO 

DEVIL CR, 

ONEIDA CO 

Roadway delineation 

Longitudinal pavement 

markings - new

0 29000 29000 HSIP 

(Sectio

n 148)

Rural 

Minor 

Collector

0 0 Other 

Local 

Agency

Lane 

Departure

STP-7151, 

INT BENTON 

ST & 2ND 

AVE, 

POCATELLO 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 19000

0

21300

0

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

15000 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons

STC-1846, 

CINDER 

BUTTE 

CURVES 

ROAD EDGE, 

BINGHAM CO 

Roadway Pavement 

surface - miscellaneous

0 25000 23600

0

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

407 0 County 

Highway 

Agency

Lane 

Departure
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STP-7316, 

INT HOLMES 

AVE & 1ST 

ST, IDAHO 

FALLS 

Intersection geometry 

Auxiliary lanes -

miscellaneous/other/unsp

ecified

0 64000 43400

0

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

12500 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons

SMA-7406, 

17TH ST 

SAFETY 

AUDIT, 

IDAHO FALLS 

Non-infrastructure Road 

safety audits

0 83000 83000 HSIP 

(Sectio

n 148)

Urban 

Minor 

Collector

26187 0 City of 

Municip

al 

Highway 

Agency

intersecti

ons and 

lane 

departure

OFFSYS, S 

BATES RD 

WARNING 

SIGNS 

Roadway signs and traffic 

control Roadway signs 

and traffic control - other

0 15000 15000 HSIP 

(Sectio

n 148)

Rural 

Local 

Road or 

Street

0 0 County 

Highway 

Agency

intersecti

ons and 

lane 

departure

OFFSYS, 

SNAKE RV RD 

GUARDRAIL, 

MADISON CO 

Roadside Barrier -

concrete

0 82710 85710 HSIP 

(Sectio

n 148)

variable 0 0 County 

Highway 

Agency

Roadway 

Departure

STP-7343, 

CHERRY LN; 

N LINDER TO 

N MERIDIAN 

RD LIGHTING 

Lighting Continuous 

roadway lighting

0 74000 51400

0

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

20517 0 Other 

Local 

Agency

Lane 

Departure

OFFSYS, E 

CANYON RD 

GUARDRAIL, 

Roadside Barrier- metal 0 48000 32300

0

HSIP 

(Sectio

n 148)

Rural 

Minor 

Collector

572 0 Other 

Local 

Agency

Roadway 

Departure
2015 Idaho Highway Safety Improvement Program

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EASTSIDE HD 

#3 

STC-7571, 

MERKLEY & 

TANNER LN 

INT 

IMPROVEME

NTS 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 55000 20300

0

HSIP 

(Sectio

n 148)

Urban 

Minor 

Collector

1700 0 County 

Highway 

Agency

Intersecti

ons

US 93, 200 

SOUTH RD, 

JEROME CO 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 50000

0

72950

00

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

6208 55 State 

Highway 

Agency

Intersecti

ons

I 15, OSGOOD 

RAMP EXT, 

BONNEVILLE 

CO 

Interchange design 

Extend existing lane on 

ramp

0 10000

0

70000

0

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Interstate

5000 75 State 

Highway 

Agency

Lane 

Departure

SMA-7276, 

SOUTH BLVD 

CORRIDOR 

RRFB LIGHT, 

IDAHO 

FALLS 

Pedestrians and bicyclists 

Miscellaneous 

pedestrians and bicyclists

0 30000 14800

0

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

7625 0 City of 

Municip

al 

Highway 

Agency

Pedestria

ns

STC-5810, 

COW CR RD 

GUARDRAIL, 

BOUNDARY 

Roadside Barrier- metal 0 27000 12100

0

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

465 0 County 

Highway 

Agency

Roadway 

Departure
2015 Idaho Highway Safety Improvement Program

27

CO 

SH 16, INT 

BEACON 

LIGHT RD 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 11900

0

11190

00

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

7992 65 State 

Highway 

Agency

Intersecti

ons

STC-4771, 

SOUTHWICK 

& COYOTE 

GRADE 

GRDRL, NEZ 

PERCE CO 

Roadside Barrier- metal 0 15000

0

33800

0

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

430 0 County 

Highway 

Agency

Roadway 

Departure

US 95, 

ELMIRA RD 

TURNBAY, 

BONNER CO 

Intersection geometry 

Auxiliary lanes -

miscellaneous/other/unsp

ecified

0 60000 62500

0

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

1600 65 State 

Highway 

Agency

Intersecti

ons

SH 25, INT 

BASE LINE 

RD, 

MINIDOKA 

CO 

Intersection geometry 

Intersection geometrics -

miscellaneous/other/unsp

ecified

0 63318 33031

8

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

1727 55 State 

Highway 

Agency

Intersecti

ons

SH 6, 

FLANNIGAN 

CR, N SH-9 & 

S SH-9 

TURNBAYS 

Intersection geometry 

Auxiliary lanes -

miscellaneous/other/unsp

ecified

0 40000 11200

00

HSIP 

(Sectio

n 148)

variable 0 0 State 

Highway 

Agency

Intersecti

ons
2015 Idaho Highway Safety Improvement Program

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SMA-7086, 

INT BELLIN &

GRANDVIEW 

ELEVATION, 

IDAHO FALLS 

Alignment Vertical 

alignment or elevation 

change

0 47000 12300

0

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

5000 0 City of 

Municip

al 

Highway 

Agency

Lane 

Departure

US 95, 

WINDFALL 

PASS CURVE, 

BENEWAH 

CO 

Alignment Horizontal and 

vertical alignment

0 20000

0

38850

0

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

2815 60 State 

Highway 

Agency

Lane 

Departure

STC-4715, 

CLEAR CR RD 

GUARDRAIL, 

IDAHO CO 

Roadside Barrier- metal 0 51000 31000

0

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

93 0 County 

Highway 

Agency

Roadway 

Departure

SH 48, 

4000E/4100

E 

INTERSECTIO

NS IMP 

Intersection geometry 

Auxiliary lanes -

miscellaneous/other/unsp

ecified

0 10000

0

60000

0

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

3864 55 State 

Highway 

Agency

Intersecti

ons

SMA-7166, 

LOMAX & F 

ST FLASHING 

STOP SIGNS, 

IDAHO FALLS 

Intersection traffic control 

Intersection flashers - add 

stop sign-mounted

0 23000 14900

0

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial 

and Urban 

Collector

5490 0 City of 

Municip

al 

Highway 

Agency

Intersecti

ons

US 30, N 400 

TO PARKE 

Intersection geometry 

Intersection geometrics -

0 47100

0

64130

00

HSIP 

(Sectio

Rural 

Minor 

3248 65 State 

Highway 

Intersecti

ons
2015 Idaho Highway Safety Improvement Program

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AVE, BURLEY miscellaneous/other/unsp

ecified

n 148) Arterial Agency

STC-2765, 

BOB BARTON 

RD & 100S 

RD SFTY IMP, 

JEROME HD 

Miscellaneous 0 4000 55000 HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

1674 0 Other 

Local 

Agency

Intersecti

ons

STC-7874, N 

POLK ST 

SAFETY IMPR 

PHASE 2, 

MOSCOW 

Pedestrians and bicyclists 

Install sidewalk

0 14560

3

14560

3

HSIP 

(Sectio

n 148)

Urban 

Minor 

Collector

1800 0 City of 

Municip

al 

Highway 

Agency

Pedestria

ns
2015 Idaho Highway Safety Improvement Program

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Progress in Achieving Safety Performance Targets

Overview of General Safety Trends

Present data showing the general highway safety trends in the state for the past five years. 

Performance Measures* 2010 2011 2012 2013 2014

Number of fatalities 237.2 217.2 203.6 200 192

Number of serious injuries 1558.6 1479.4 1375.6 1327.4 1302.2

Fatality rate (per HMVMT) 1.53 1.4 1.31 1.28 1.22

Serious injury rate (per 

HMVMT)

10.07 9.53 8.88 8.5 8.26

*Performance measure data is presented using a five-year rolling average.
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To the maximum extent possible, present performance measure* data by functional classification and ownership. 

Year - 2014

Function 

Classification

Number of fatalities Number of serious injuries Fatality rate (per HMVMT) Serious injury rate (per HMVMT)

RURAL PRINCIPAL 

ARTERIAL - INTERSTATE

23.8 96.8 1.06 4.32

RURAL PRINCIPAL 

ARTERIAL - OTHER 

FREEWAYS AND 

EXPRESSWAYS

0 0 0 0

RURAL PRINCIPAL 

ARTERIAL - OTHER

40.8 183.6 1.84 8.28

RURAL MINOR 

ARTERIAL

19 107.2 2.11 11.89

RURAL MINOR 

COLLECTOR

7.8 36.4 3.19 14.96

RURAL MAJOR 

COLLECTOR

35.6 148.6 2.76 11.51

RURAL LOCAL ROAD OR 

STREET

26 90 1.16 4

URBAN PRINCIPAL 5.6 55.4 0.42 4.11
2015 Idaho Highway Safety Improvement Program

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ARTERIAL - INTERSTATE

URBAN PRINCIPAL 

ARTERIAL - OTHER 

FREEWAYS AND 

EXPRESSWAYS

0 0 0 0

URBAN PRINCIPAL 

ARTERIAL - OTHER

17 294.2 0.76 13.21

URBAN MINOR 

ARTERIAL

9 177.8 0.59 11.64

URBAN MINOR 

COLLECTOR

0 0 0 0

URBAN MAJOR 

COLLECTOR

2.6 53.2 0.4 8.1

URBAN LOCAL ROAD 

OR STREET

4.8 66.6 0.56 7.84
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Year - 2014

Roadway Ownership Number of 

fatalities

Number of serious 

injuries

Fatality rate (per 

HMVMT)

Serious injury rate (per 

HMVMT)

STATE HIGHWAY AGENCY 111.6 643.8 0.71 4.09

ALL LOCAL OWNERSHIP 80.4 666.4 0.51 4.23

TOWN OR TOWNSHIP HIGHWAY AGENCY 0 0 0 0

CITY OF MUNICIPAL HIGHWAY AGENCY 0 0 0 0

STATE PARK, FOREST, OR RESERVATION AGENCY 0 0 0 0

LOCAL PARK, FOREST OR RESERVATION AGENCY 0 0 0 0

OTHER STATE AGENCY 0 0 0 0

OTHER LOCAL AGENCY 0 0 0 0

PRIVATE (OTHER THAN RAILROAD) 0 0 0 0

RAILROAD 0 0 0 0

STATE TOLL AUTHORITY 0 0 0 0

LOCAL TOLL AUTHORITY 0 0 0 0

OTHER PUBLIC INSTRUMENTALITY (E.G. AIRPORT, 

SCHOOL, UNIVERSITY)

0 0 0 0
2015 Idaho Highway Safety Improvement Program

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Describe any other aspects of the general highway safety trends on which you would like to elaborate.

Safety continues to be a priority in Idaho and our five year average fatality rate continues to decline. 

HSIP has played a part in this through both infrastructure safety enhancements and through behavioral 

programs. 

Application of Special Rules

Present the rate of traffic fatalities and serious injuries per capita for drivers and pedestrians over the 

age of 65. 

Older Driver

Performance Measures

2009 2010 2011 2012 2013

Fatality rate (per 

capita)

0.37 0.34 0.33 0.31 0.31

Serious injury rate 

(per capita)

2.03 1.97 1.86 1.76 1.77

Fatality and serious 

injury rate (per capita)

2.39 2.31 2.18 2.06 2.08

*Performance measure data is presented using a five-year rolling average.

1. (F+SI 2013 Drivers and Pedestrians 65 years of age and older/2013 Population Figure*) + (F+SI 

2012 Drivers and Pedestrians 65 years of age and older /2012 Population Figure) + (F+SI 2011 

Drivers and Pedestrians 65 years of age and older/2011 Population Figure) + (F+SI 2010 Drivers 

and Pedestrians 65 years of age and older/2010 Population Figure) + (F+SI 2009 Drivers and 

Pedestrians 65 years of age and older/2009 Population Figure) / 5

Calculate Rate for 2009 

2.

1. (F+SI 2011 Drivers and Pedestrians 65 years of age and older/2011 Population Figure*) + 

(F+SI 2010 Drivers and Pedestrians 65 years of age and older /2010 Population Figure) + 

(F+SI 2009 Drivers and Pedestrians 65 years of age and older/2009 Population Figure) + 

(F+SI 2008 Drivers and Pedestrians 65 years of age and older/2008 Population Figure) + 

(F+SI 2007 Drivers and Pedestrians 65 years of age and older/2007 Population Figure) / 5
2015 Idaho Highway Safety Improvement Program

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Does the older driver special rule apply to your state? 

No
2015 Idaho Highway Safety Improvement Program

46

Assessment of the Effectiveness of the Improvements (Program 

Evaluation)

What indicators of success can you use to demonstrate effectiveness and success in the Highway 

Safety Improvement Program?

None

Benefit/cost

Policy change

Other: Other-More awareness of the importance of safety projects and using a data driven approach. 

What significant programmatic changes have occurred since the last reporting period? 

Shift Focus to Fatalities and Serious Injuries

Include Local Roads in Highway Safety Improvement Program

Organizational Changes

None

Other: 

Briefly describe significant program changes that have occurred since the last reporting period. 

Idaho continues to enhance the Highway Safety Corridor Analysis (HSCA) program to ensure data used 

for the selection of safety projects is up to date. ITD continues working towards automating portions of 
2015 Idaho Highway Safety Improvement Program

47

the HSCA process so the analysis is available sooner. ITD has started using TREDIS to estimate B/C ratios 

and evaluate projects nominated for FY20 and beyond. ITD is researching systemic approaches to safety 

analysis of projects.
2015 Idaho Highway Safety Improvement Program

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SHSP Emphasis Areas

For each SHSP emphasis area that relates to the HSIP, present trends in emphasis area performance measures. 

Year - 2013

HSIP-related SHSP 

Emphasis Areas

Target Crash Type Number of 

fatalities

Number of 

serious 

injuries

Fatality rate 

(per HMVMT)

Serious injury 

rate (per 

HMVMT)

Other1Other2Other3

Intersections All 38 487.8 0.24 3.12 0 0 0

Pedestrians Vehicle/pedestrian 11.4 51.6 0.07 0.33 0 0 0

Bicyclists Vehicle/bicycle 3.2 49 0.02 0.31 0 0 0

Older Drivers All 39.2 227.8 0.25 1.46 0 0 0

Motorcyclists Vehicle/Motorcycle 25.4 165.6 0.16 1.06 0 0 0

Work Zones work zone crashes 2.2 25.2 0.01 0.16 0 0 0

Distracted All 81.6 622.8 0.52 3.99 0 0 0

Aggressive All 48.6 428.6 0.31 2.75 0 0 0

Safety Restraints All 80.8 286.2 0.52 1.83 0 0 0

Impaired All 81.8 258.2 0.52 1.65 0 0 0

Youthful Driver All 29.6 242.8 0.19 1.56 0 0 0

Commercial Driver Truck-related 22.6 90.8 0.14 0.58 0 0 0
2015 Idaho Highway Safety Improvement Program

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Single Vehicle Run 

off Road

Run-off-road 100.8 431.8 0.65 2.77 0 0 0

Head On/Side 

Swipe Opposite

Head On/Side Swipe 

Opposite

38 208 0.24 1.33 0 0 0
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Groups of similar project types

Present the overall effectiveness of groups of similar types of projects.

Year - 2014

HSIP Subprogram TypesTarget 

Crash Type

Number of 

fatalities

Number of 

serious injuries

Fatality rate (per 

HMVMT)

Serious injury rate 

(per HMVMT)

Other1Other2Other3

Other-Highway 

Safety Corridor

All 192 1302.2 1.22 8.26 0 0 0
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Systemic Treatments

Present the overall effectiveness of systemic treatments.

Year - 2014

Systemic improvement Target 

Crash 

Type

Number of 

fatalities

Number of 

serious 

injuries

Fatality rate 

(per 

HMVMT)

Serious injury 

rate (per 

HMVMT)

Other1Other2Other3

Upgrade Guard Rails 100.8 414.4 0.64 2.6 0 0 0

Install/Improve Pavement Marking 

and/or Delineation

All 100.8 414.4 0.64 2.6 0 0 0

Add/Upgrade/Modify/Remove 

Traffic Signal

36.2 494 0.23 3.13 0 0 0

Install/Improve Signing All 192 1302.2 1.22 8.26 0 0 0
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Describe any other aspects of the overall Highway Safety Improvement Program effectiveness on 

which you would like to elaborate. 

Safety continues to be a priority for Idaho. The HSIP increased awareness that the use of low cost 

measures can enhance the safety of the roadways.
2015 Idaho Highway Safety Improvement Program

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Project Evaluation

Provide project evaluation data for completed projects (optional). 

Location Functional 

Class

Improvement 

Category

Improvement 

Type

BefFatalBefSerious 

Injury

Bef-All 

Injuries

BefPDOBefTotalAftFatalAftSerious 

Injury

Aft-All 

Injuries

AftPDOAftTotalEvaluation 

Results 

(Benefit/ 

Cost Ratio)
2015 Idaho Highway Safety Improvement Program

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Optional Attachments

Sections Files Attached
2015 Idaho Highway Safety Improvement Program

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Glossary

5 year rolling average means the average of five individual, consecutive annual points of data (e.g. 

annual fatality rate).

Emphasis area means a highway safety priority in a State’s SHSP, identified through a data-driven, 

collaborative process. 

Highway safety improvement project means strategies, activities and projects on a public road that are 

consistent with a State strategic highway safety plan and corrects or improves a hazardous road location 

or feature or addresses a highway safety problem. 

HMVMT means hundred million vehicle miles traveled.

Non-infrastructure projects are projects that do not result in construction. Examples of noninfrastructure projects include road safety audits, transportation safety planning activities, 

improvements in the collection and analysis of data, education and outreach, and enforcement 

activities.

Older driver special rule applies if traffic fatalities and serious injuries per capita for drivers and 

pedestrians over the age of 65 in a State increases during the most recent 2-year period for which data 

are available, as defined in the Older Driver and Pedestrian Special Rule Interim Guidance dated 

February 13, 2013. 

Performance measure means indicators that enable decision-makers and other stakeholders to monitor 

changes in system condition and performance against established visions, goals, and objectives.

Programmed funds mean those funds that have been programmed in the Statewide Transportation 

Improvement Program (STIP) to be expended on highway safety improvement projects.

Roadway Functional Classification means the process by which streets and highways are grouped into 

classes, or systems, according to the character of service they are intended to provide.

Strategic Highway Safety Plan (SHSP) means a comprehensive, multi-disciplinary plan, based on safety 

data developed by a State Department of Transportation in accordance with 23 U.S.C. 148. 

Systemic safety improvement means an improvement that is widely implemented based on high risk 

roadway features that are correlated with specific severe crash types. 

Transfer means, in accordance with provisions of 23 U.S.C. 126, a State may transfer from an 

apportionment under section 104(b) not to exceed 50 percent of the amount apportioned for the fiscal 

year to any other apportionment of the State under that section.