Directions

Heavy Duty Truck Emissions Benefit Calculator (for Drayage and Other Heavy Duty Trucks)

This calculator allows a user to input information about a particular medium-heavy or heavy-duty truck engine and estimate the emissions benefits of a 

proposed project funded under the $1B Goods Movement Emission Reduction Program. Included below is the methodology and directions for filling in 

each field necessary for emissions benefit estimation. 

Methodology:

Emissions from each project is the product of annual accrual (miles/year), pollutant (NOx or PM) and model year specific emission rates. (grams/mile)

To estimate the benefits of the proposed project, the baseline emissions from the original truck(s) and the project emissions are calculated

and the difference between the two is the benefit of that project. See example below:

Emissions (lbs/year) = Emission Rate (g/mile)*Annual Accrual (miles/year)*1lb/453.6 grams

Directions:

Table 2: “Input Data” Tab - Input Data Fields and Descriptions

All fields indicated in Red are required. Ones indicated in blue are optional.

Project Name

An ID that is unique to each vehicle/engine or each vehicle/engine 

group. This ID can be any value/character the user chooses. No two 

projects should have the same ID and each project should be input in a 

single row.

First Year of Operation

Project calendar year (valid entries: 2012-2016) - this is the calendar 

year the project will be in use and operational

Project Option - Detailed

What is the project type? The list includes retrofits, repowers, 

replacements and 3-Way Truck transactions. See " Guidelines for 

Implementation" for details. For 2-for-1 replacements, use 

"Replacements" and then fill the 2nd truck details in appropriate columns 

in the Input Data sheet.

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Drayage Truck (Y/N)

If the existing truck is a drayage truck select "Yes", otherwise select 

"No". 

Engine Model Year

Model year of the existing truck engine to be replaced, repowered, or 

retrofit.

GVWR

Gross Vehicle Weight Rating. Requires user to select a Class 7 (26001-

33000) or Class 8 (33001-higher) vehicle.

DPF Installed?

Requires user to input if existing truck has any retrofits: Level 1 PM 

(25% PM reduction), Level 2 PM (50% PM reduction), Level 3PM (85% 

PM reduction), Level 3PM+ Mark 1 NOX (85% PM + 25% NOX 

reduction) or none.

CA VMT

Project applicant to input annual miles traveled in California for existing 

vehicle. For 2-for-1 options or 3-way truck options, input only the VMT 

for the 1st truck in this cell (for 3-way, it is Truck A).

2 Trucks being replaced by one?

Prop 1B offers an option for two old trucks from a fleet (or other source) 

be scrapped and replaced by a new truck funded by Prop 1B. If this is 

the case, then user needs to select "Y" for this column. If not, user 

needs to choose "N".

DPF on 2nd Truck or Truck B of 3-Way?

Requires user to input if existing project has any retrofits: Level 1 PM 

(25% PM reduction), Level 2 PM (50% PM reduction), Level 3PM (85% 

PM reduction), Level 3PM+ Mark 1 NOX (85% PM + 25% NOX 

reduction) or none. This needs to be input only if selecting a 3-way truck 

option or a 2-for-1 option. Also, this is for the 2nd truck in a 2-for-1 

option or for Truck B in a 3-way option.

Drayage Truck for 2nd Truck or Truck B?

If the existing second truck (or Truck B in a 3-way) is a drayage truck 

select "Yes", otherwise select "No". 

Engine Model Year of 2nd Truck or Truck B 

(3-Way Project)

Model year of the existing truck engine to be replaced, repowered, or 

retrofit. This is for the 2nd truck of a two-truck for one project or for 

Truck B in a 3-Way Truck project.

GVWR of 2nd truck or Truck B

Gross Vehicle Weight Rating. Requires user to select a Class 7 (26001-

33000) or Class 8 (33001-higher) vehicle.

Annual CA VMT for 2nd Truck or Truck B

Project applicant to input annual miles traveled in California for the 

second truck in a 2-for-1 option for for Truck B in a 3-way option.

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GVWR

Gross Vehicle Weight Rating of Replacement truck. Requires user to 

select a Class 7 (26001-33000) or Class 8 (33001-higher) vehicle.

Fuel Type

Fuel type used for replacement/repowered truck (valid entries: diesel, 

LNG/CNG, Hybrid, Electric)

% CA Operation proposed

Prop1B now offers the option to allow projects that operate 90% of their 

annual miles in California with new trucks funded with Prop 1B grants. 

This is where users opt for this choice if selected by the applicant. The 

options are either 100% or 90%.

NOx Cert Level

For the 08-09 Grants, Prop1B requires applicants to only select one of 

three NOx CERT level engines for funding for new or repowered trucks. 

The three levels are 1.2, 0.5 and 0.2 gNOx/bhp-hr. The applicant does 

not have to choose the engine model year for the replacement or 

repowered truck at the time of application.

Total Project Cost ($) What is the total cost of the project ($).

 Prop 1B funding for Truck B (3-Way-Truck) 

The Bond program contribution to the project ($) for retrofitting truck A in 

a 3-way project. Leave blank if not applicable.

 Prop 1B Investment ($) 

The Bond program contribution to the project ($) for either a retrofit, 

repower, or replacement. The input here does not include the retrofit 

funding for Truck A in a 3-Way Project.

 Local Details of funding $$ from local agencies. 

 Private Funding from private sources (applicant, loan, etc.)

 AB118 Funding from AB 118 (Greenhouse Gas Incentives)

 Other State 

Other State Funds. Input only if other (non AB 118) State sources of 

funding are used in addition to Prop 1B.

Project Life (Years)

The length of time an equipment owner is obligated (under an equipment 

project contract) to maintain and operate the bond-funded equipment 

according to the requirements of the program. 

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TAB DESCRIPTION

Directions

Provides directions on using the calculator 

to calculate emissions reductions for various 

project options.

Sample Inputs

This tab contains sample projects with 

sample inputs. 

Input Data

In this tab the applicant or the local agency 

will input the data necessary for emissions 

benefit estimation for each truck project.

Benefits Summary

This tab contains a summary of the PM and 

NOX emissions benefits by project ID. IT 

also provides the CE for each project. Also 

provided is a summary of the total for all the 

projects input into the Input Data tab.

Table 1: Summary of worksheets in the calculator
Directions
Directions
Directions
Sample Inputs

SAMPLE PROJECTS WITH INPUTS

This tab contains sample project descriptions with the correct inputs based on the information available. 

 The calculator has been designed to make available only the options allowed under the 2010 guidelines of Prop 1B.

Complete details of the sample projects are provided in the Appendix of the Directions document available as a companion document to this calculator.

Example Project

A first project in 2012 is to replace a non-drayage, 1972 Class 8 truck (50,000 CA VMT) which has no initial filters. The replacement is a Class 8 truck with a 1.2 NOx diesel engine with 100% proposed operation in California. The requested funding amo

In 2011, a Local Agency C proposes to retrofit and replace trucks. The Table below provides inputs required to perform emission reductions.

A second project in 2012 is a 2 for 1 project. The first truck is a non-drayage, 1972 Class 7 truck (50,000 CA VMT) which has no initial filters. The second truck is a 1972 class 7, non-drayage truck (50, 000 CA VMT) with a level 2 PM filter already install

A third project in 2012 is a level 3 PM Retrofit project. The truck is non-drayage, 1994 Class 7 truck (50,000 CA VMT) which already has a Level 1 PM filter installed in it. The retrofit is with a level 3 PM filter with $5,000 and a project life of 2 years.

A final project in 2012 is a 3-Way Truck project. The first truck is a drayage, 1998 Class 8 truck (50,000 CA VMT) which has a level 3 PM filter. The second truck is a 1972 class8, non-drayage truck (5,000 CA VMT) with no filters installed. The replacem
Input Data

Project Name

First Year of 

Operation

Project Option - 

Detailed

Drayage 

Truck 

(Y/N)

Engine 

Model 

Year GVWR

DPF 

Installed? CA VMT

2 Trucks being 

replaced by one?

DPF on 2nd Truck or 

Truck B of 3-Way?

Drayage Truck for 2nd 

truck or Truck B?

Engine Model Year of 

2nd Truck or Truck B 

(3-Way Project)

GVWR of 2nd truck or 

Truck B

Example 1 2012 Replacement N 1972 33001 and > N 50000 N INPUT NOT REQUIRED INPUT NOT REQUIRED INPUT NOT REQUIRED INPUT NOT REQUIRED

Example 2 2012 Replacement N 1972 26001-33000 N 50000 Y N N 1972 26001-33000

Example 3 2012 Level 3 PM Retrofit N 1994 26001-33000 N 50000 INPUT NOT REQUIRED INPUT NOT REQUIRED INPUT NOT REQUIRED INPUT NOT REQUIRED INPUT NOT REQUIRED

Example 4 2012 3-Way Truck N 1998 33001 and > N 50000 INPUT NOT REQUIRED N N 1972 33001 and >
Input Data

Annual CA VMT 

for 2nd Truck or 

Truck B GVWR Fuel Type

% CA

Operation 

proposed NOx CERT Level

 Total Project 

Cost ($) 

 Prop 1B funding for 

Truck B (3-WayTruck)  Prop 1B 

Investment ($) Local Private AB118 Other State Project Life (Years)

33001 and > diesel 100 percent 1.20 $ 110,000 $ 40,000 5

 50,000 26001-33000 diesel 90 percent 0.20 $ 150,000 $ 40,000 5

INPUT NOT REQUIRED diesel 100 percent INPUT NOT REQUIRED $ 20,000 $ 5,000 2

 5,000 33001 and > diesel 90 percent 0.20 $ 150,000 $ 5,000 $ 60,000 5

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Emissions Benefits Summary

This tab provides the emissions benefits (PM and NOX) for each proposed project (by ID and Project Type). 

If "FALSE" or "N/A" or "VALUE" appears in the table there is an invalid project entry.

Total State 

Investment ($)

Total PM 

Benefits (lbs) 

Total NOX 

Benefits (lbs)

Cost Effectiveness 

NOX+20*PM (lbs/State 

$)

$ 150,000 2,796 28,749 0.56 

EMISSIONS BENEFITS AND COST EFFECTIVENESS FOR ALL PROJECTS

Project Name

 Project 

Calendar 

Year

Project - Detailed State Investment 

($)

Total PM Benefits 

(lbs) 

Total NOX Benefits 

(lbs) 

Cost Effectiveness 

NOX+20*PM (lbs/State $) 

Retrofit, Repower & 

Replacement

Example 1 2012 Replacement $ 40,000 1,026.38 7,335.17 0.70

Example 2 2012 Replacement $ 40,000 1,361.74 12,811.65 1.00

Example 3 2012 Level 3 PM Retrofit $ 5,000 85.01 0.00 0.34

Example 4 2012 3-Way Truck $ 65,000 323.05 8,602.30 0.23

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