Use of Roundabouts and Innovative Intersection Designs at High-Speed Intersections in Texas

Rural high-speed roads continue to see increased volumes statewide. Traditionally, those roads might be converted to limited-access highways under the speeds and volumes seen today, but that level of systematic conversion is not feasible. As a result, there are numerous at-grade access points on rural high-speed roads that introduce potential operational delays and safety concerns. Traditional at-grade intersections may not efficiently accommodate the demands increasingly found in many locations across Texas, particularly with increases in oversize/overweight (OS/OW) vehicle volumes in some areas. Newer alternatives, such as modern roundabouts and innovative intersection designs, may be more suitable to improve safety and operations at many locations; however, guidance is needed to identify suitable alternatives and develop appropriate design details for specific intersections. Researchers will investigate the operational and safety benefits of modern roundabouts and selected innovative intersection designs for high-speed locations, as well as best practices for designing these intersection alternatives. In this project, Researchers will compile proven results from these designs in other states and collect and analyze operational and safety data within Texas to develop design guidance that TxDOT can use to implement roundabout designs that accommodate OS/OW vehicles and innovative intersections that provide appropriate access in rural areas.

Language

  • English

Project

Subject/Index Terms

Filing Info

  • Accession Number: 01715939
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-7036
  • Files: RiP, STATEDOT
  • Created Date: Sep 9 2019 4:10PM