Safety Performance of Rural Four-Lane Undivided Roadways and Rural Four-Lane Roadways with a Two-Way Left-Turn Lane

The objectives of this project are: (1) to examine the safety performance of existing rural four-lane undivided roadways with/without 4 feet wide flush medians and rural four-lane roadways with a two-way left-turn lane (TWLTL) in Georgia, and (2) to develop criteria to determine when a four-lane undivided with/without a 4 feet wide flush median or a four-lane roadways with a TWLTL would be suitable on a four-lane roadway based on safety considerations.


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    • Status: Completed
    • Funding: $99852
    • Contract Numbers:

      GDOT RP 19-15

    • Sponsor Organizations:

      Georgia Department of Transportation

      One Georgia Center
      600 West Peachtree Street, NW
      Atlanta, GA  United States  30308
    • Project Managers:

      Thapa, Sunil

    • Performing Organizations:

      University Transportation Center for Alabama

      University of Alabama
      Tuscaloosa, AL  United States  35487
    • Principal Investigators:

      Liu, Jun

    • Start Date: 20190826
    • Expected Completion Date: 20201231
    • Actual Completion Date: 20201231

    Subject/Index Terms

    Filing Info

    • Accession Number: 01744655
    • Record Type: Research project
    • Source Agency: Georgia Department of Transportation
    • Contract Numbers: GDOT RP 19-15
    • Files: RIP, STATEDOT
    • Created Date: Jul 2 2020 2:02PM