CMAQ Emissions Calculator Toolkit: Roundabouts Module

The purpose of the Congestion Mitigation and Air Quality Improvement Program Emissions Calculator Toolkit (CMAQ Toolkit) is to provide users a standardized approach to estimating emission reductions from the implementation of a CMAQ-funded project. The CMAQ Toolkit uses emission rates for highway vehicles based on a series of project-scale and national-scale runs of the Motor Vehicle Emission Simulator (MOVES) as well as other data sources. For each tool in the toolkit, the inputs and methodology are described in user guides along with some example cases. The roundabout project emission reductions calculator estimates the emissions benefit for installing a roundabout in place of a traditional signalized or un-signalized intersection. This tool is intended for a single or double lane roundabout with three or four approaches. This document is organized into three sections – User Guide, Tool Methodology, and Examples – to aid the user in understanding and interpreting results from the calculator. The User Guide directs the user on how to properly input values into the tool, and provides definitions of both user inputs and tool outputs. The Tool Methodology section outlines the steps taken by the tool to calculate emission reductions, as well as any assumptions incorporated into the tool. This section also describes the equations used within the tool to calculate emission benefits. The Examples section provides instructive examples of how to use the tool for project analysis.

• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/53730
• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Publication Date: 2019-9

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 11p

Subject/Index Terms

• TRT Terms: Air quality management; Estimating; Intersections; Methodology; Pollutants; Roundabouts
• Identifier Terms: Congestion Mitigation and Air Quality Improvement Program
• Subject Areas: Environment; Highways; Operations and Traffic Management; Planning and Forecasting;

Filing Info

• Accession Number: 01760445
• Record Type: Publication
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: Dec 21 2020 10:02AM