CMAQ Emissions Calculator Toolkit: Roundabouts Module

Details

• Corporate Creators:
  Federal Highway Administration (U.S.)
• Corporate Contributors:
  Federal Highway Administration Resource Center (U.S.)
• Subject/TRT Terms:
  • Air quality
  • Congestion management systems
  • Roundabouts
  • Analysis
  • Engine idling
• Resource Type:
  Manual
• Geographical Coverage:
  United States
• Corporate Publisher:
  Federal Highway Administration (U.S.)
• Abstract:
  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. 1 Emission reductions are estimated by calculating the reduction in idling emissions as a result of installing the roundabout. This is accomplished by calculating the post-build delay at the roundabout and subtracting it from the existing/no-build delay at the intersection. Emission reductions are calculated for peak and off-peak hours during a typical weekday.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/53730/dot_53730_DS1.pdf
• File Type:
  [PDF - 854.31 KB]
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:486af62a75fa8488de9d2a9d717002b3a0dbb82246a8e7fbf3b9f734e06526548a018f3fc92512d098c841ea8d38ae257144159576621b9f6ed8935b1e6742bf