Environmental Impact of Roundabouts

The objective of this project is to investigate the effects on vehicle emissions of replacing a signal-controlled, or stop-controlled intersection, with a roundabout, using a before-and-after approach based on field data measurements and microsimulation traffic simulation. This project will consider five roundabouts representing various geometric, control, and traffic types. They are located in various towns in the State of Connecticut, namely Ellington, Glastonbury, Guilford, Monroe, and Salem. Each roundabout has its own unique geometric and traffic operational characteristics and was designed and built for difference reasons

Language

• English

Project

• Status: Active
• Contract Numbers:

  SPR-2331

• Sponsor Organizations:

  Connecticut Department of Transportation

  Newington, CT  United States  06131-7546
• Managing Organizations:

  Connecticut Department of Transportation

  Newington, CT  United States  06131-7546
• Project Managers:

  Garcia-Theran, Mauricio

• Performing Organizations:

  University of Hartford

  200 Bloomfield Avenue
  West Hartford, CT  United States  06117
• Principal Investigators:

  Fang, Clara

• Start Date: 20231101
• Expected Completion Date: 20260930
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Environmental impacts; Exhaust gases; Geometric design; Microsimulation; Roundabouts; Traffic characteristics
• Subject Areas: Environment; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 01958235
• Record Type: Research project
• Source Agency: Connecticut Department of Transportation
• Contract Numbers: SPR-2331
• Files: RIP, STATEDOT
• Created Date: Jun 18 2025 4:13PM