HSIP-funded projects at intersections:*

136 PROJECTS INSTALLED EDGE OR 

SHOULDER RUMBLE STRIPS

THE HIGHWAY SAFETY IMPROVEMENT PROGRAM (HSIP) 2021

1 Fatality Analysis Reporting System (FARS): 2006-2019 Final File and 2020 Annual Report File (ARF), report generated September 20, 2022, https://cdan.dot.gov/query.

2 FHWA, “About Intersection Safety” (May 2022), https://safety.fhwa.dot.gov/intersection/about/index.cfm, and “Safe System Intersections” (March 2021), https://safety.fhwa.dot.gov/

intersection/ssi/index.cfm.

HSIP-funded projects improved 

4,515 INTERSECTIONS

across the United States.

All 50 States

plus the District of Columbia and 

Puerto Rico used HSIP funds for

INTERSECTION IMPROVEMENTS. 

In 2021

States obligated 

29 percent of HSIP 

funds to intersection 

safety projects.

HSIP in 2021

The HSIP funded

1,710

with a total cost of 

$945 million.

INTERSECTION 

PROJECTS

HSIP funded 

16

including median U-Turns (MUTs) and 

restricted crossing U-Turns (RCUTs).

PROJECTS DEDICATED 

TO REDUCED LEFT-TURN 

CONFLICT INTERSECTIONS

4 PROJECTS APPLIED HIGH FRICTION 

SURFACE TREATMENTS

47 PROJECTS WIDENED 

THE INTERSECTION

Modernize or Replace Traffic Signal

167 projects, $81 million total 1

Roundabout

159 projects, $160 million total 2

Signal-Controlled Systemic Improvements

63 Projects, $52 million total 3

Sign or Mounted Intersection Flashers

40 projects, $4 million total 4

New Signal

31 projects, $14 million total 5

Top 5 INTERSECTION TRAFFIC 

CONTROL PROJECT TYPES

This information comes from 2021 State HSIP reports. To view individual reports, visit https://safety.fhwa.dot.gov/hsip/reports/.

HSIP Calms Intersections

*Other projects may have incorporated these strategies into 

larger efforts but are not represented in the database.

Funding for Safer Intersections

Intersections, driveways, and access points are crucial connections to 

roadways. However, they also create conflict points where the potential for 

a crash between users increases. In 2020, more than a quarter (8,750) 

of all fatal crashes in the United States occurred at intersections.1

The HSIP can help support a Safe System and keep all road users safe by 

funding intersection improvements that minimize and modify conflict 

points, reduce vehicle speeds, improve visibility, or provide space and 

protection for vulnerable road users such as pedestrians and bicyclists.2
To find out how HSIP can help 

save lives in your community, 

contact your State DOT:

https://www.fhwa.dot.gov/

about/webstate.cfm

Have an HSIP success story? Share your projects on Facebook, 

Twitter, and Instagram with #HSIPSavesLives.

FHWA-SA-22-073 

Intersection Countermeasures

3 Simpson, C.L. and J.E. Hummer, “Evaluation of the Conversion from Two-Way Stop Sign Control to All-Way Stop Sign Control at 53 Locations in North Carolina.” Journal of Transportation 

Safety and Security, Vol. 2, No. 3, 2010, 239-260.

FHWA lists seven Proven Safety Countermeasure (PSCs) for intersections, all of which are eligible for HSIP funding:

• Backplates with Retroreflective 

Borders

• Reduced Left-Turn Conflict 

Intersections

• Corridor Access Management

• Roundabouts

• Left- and Right-Turn Lanes at TwoWay Stop-Controlled Intersections

• Systemic Application of Multiple 

Low-Cost Countermeasures at 

Stop-Controlled Intersections

• Yellow Change Intervals

In addition to these intersection-specific improvements, many other PSCs can help prevent fatal and serious injury 

crashes at intersections, including leading pedestrian intervals, crosswalk enhancements, pedestrian hybrid beacons, 

and lighting. For more information, visit https://safety.fhwa.dot.gov/provencountermeasures/.

HSIP in Action

In 2021, HSIP funded more than 200 projects dedicated to intersection PSCs, including*

159

ROUNDABOUT

PROJECTS

16

LEFT- AND RIGHTTURN LANE PROJECTS

All-Way Stops to Enhance Rural Intersection Safety

NORTH CAROLINA DEPARTMENT OF TRANSPORTATION (NCDOT)

Like many other States, rural intersection safety is a major concern for the NCDOT. In 2019 alone, the State 

saw 15,000 frontal-impact crashes at rural intersections that resulted in more than 300 fatalities. Systemically 

improving rural intersection safety in North Carolina is an enormous task because 81 percent of the State-owned 

system—more than 65,000 miles—comprises secondary routes. 

As of 2020, NCDOT has used HSIP and other funds for more than 150 projects that converted two-way stopcontrolled intersections (TWSC) to all-way stop-controlled intersections (AWSC). A study of the first 50 projects 

showed a 68-percent reduction in total crashes and a 77-percent reduction in fatal and injury crashes.3 A 2020 

follow-up study of 36 locations found that conversions eliminated fatal and severe injuries and reduced other 

crash types by 60–75 percent!

RESULT

Zero Fatal & Severe 

Injury Crashes at 

36 Locations

Two-Way Stop to 

Four-Way Stop 

Conversions

SOLUTION

Crashes 

at Rural 

Intersections

PROBLEM

4-WAY

2-WAY

30

RETROREFLECTIVE 

BACKPLATE PROJECTS

*The database counts only projects with reported codes specific to a PSC. FHWA estimates the number of projects that incorporate PSCs to be much 

higher. To view individual reports, visit https://safety.fhwa.dot.gov/hsip/reports/.