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A Sampling of Emissions Analysis Techniques for Transportation Control Measures

Descriptions of Available Methods

Emissions Analysis Techniques for TCMs


Forecasting Approaches

Selecting a Method

Descriptions of Available Methods

* TDM Evaluation Model
* TCM/Commuter Choice Model
* TCM Analyst
* CM/AQ Evaluation Model
* TCM Tools
* Off-Net/PAQONE
* ECO/Regulation XV Software
* California Standardized Methodology
* RAQC Workbook
* MWCOG Sketch-
Planning Methods
* NCTCOG Sketch-
Planning Methods
* Quick-HOV
* Traffic Simulation Models
* AirCred
* Bus Replacement Spreadsheet
* Freight Air Quality Analysis Procedures

Key Inputs and Outputs for Each Method


List of Acronyms

This section provides a detailed description of the following 19 methods.  Refer to the table below for a one-sentence overview of each method.

Summary of Methods Included*



Off-the-Shelf TDM/TCM Analysis Software
TDM Evaluation Model Software to predict trip and VMT impacts of employer-based TDM strategies.

TCM/Commuter Choice Model

Spreadsheet software based on TDM Evaluation Model; also calculates emissions.

TCM Analyst 

Spreadsheet software to estimate travel and emission impacts of TCMs.
CM/AQ Evaluation Model Software for estimating emission benefits and cost-effectiveness of potential CMAQ projects and for ranking projects.


(Center for Urban Transportation Research Average Vehicle Ridership model) Model to predict AVR impacts of workplace-based TDM programs.
Customized TDM/TCM Analysis Software

TCM Tools

Spreadsheet model for screening and sensitivity testing of a wide range of TCM strategies at an area-wide level.


Models to predict emissions impacts of various transit, non-motorized travel, and traffic flow strategies.

ECO/Regulation XV Software

Software to help employers predict benefits of and track participation in Employee Commute Options (ECO) programs.
Sketch-Plan Workbook Approaches

California Standardized Methodology

Calculation steps to estimate emissions reductions and cost-effectiveness of TDM programs, based on survey data on mode shares.

RAQC Workbook

Workbook to estimate potential benefits of various TDM strategies applied at a regional level.

MWCOG Sketch-Planning Methods

Sample calculations by the Metropolitan Washington Council of Governments (MWCOG) for various TCM strategies.

NCTCOG Sketch-Planning Methods

Sample calculations and empirical data from North Central Texas Council of Governments (NCTCOG) for TDM and traffic flow strategies.
Specialized Methods


Procedures and software to analyze impacts of HOV facilities.


(Intelligent Transportation Systems (ITS) Deployment Analysis System) Software to analyze travel and emissions impacts of over 60 ITS strategies, based on regional travel model data.


(Simplified Model for the Assessment of Regional Travel) Software to estimate air quality impacts of highway and transit network improvements.

Traffic Simulation Models

Commercial software for analyzing traffic flow and emissions impacts of intersection and roadway operational improvements.


Model for estimating emissions benefits of alternative fuel light-duty and transit vehicles.

Bus Replacement Spreadsheet

Spreadsheet for analyzing replacements of older buses with new diesel or alternative fuel buses.

Freight Air Quality Analysis Procedures

Report containing methods and procedures for assessing emissions impacts of freight strategies.

* Note:  See List of Acronyms.


Updated: 5/17/2017
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