Right Shoulder Passing Blisters Versus Left Turn Lanes

Since the implementation of KYTC’s auxiliary turn lanes policy, district-level personnel have observed that some locations have seen no safety-related impacts while suffering from significant queuing and delays from left-turn volumes that do not meet the left-turn lane threshold. Other states (e.g., Indiana) have used Passing Blister designs, which provide wider areas of full-depth pavement to accommodate passing on the shoulder under these conditions. While the effectiveness of such a design has not been fully evaluated, its reduced costs and potential to serve as a reliable solution (as has been the case in other states), suggest it may help alleviate low volume left-turn lane blockages.


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    • Status: Active
    • Funding: $77500
    • Contract Numbers:

      KYSPR 20-596

    • Sponsor Organizations:

      Kentucky Transportation Cabinet

      200 Mero Street
      Frankfort, KY  United States  40622
    • Performing Organizations:

      University of Kentucky, Lexington

      Kentucky Transportation Center College of Engineering, 176 Raymond Building
      Lexington, KY  United States  40506-0281
    • Principal Investigators:

      Kirk, Adam

    • Start Date: 20190701
    • Expected Completion Date: 20230630
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01711193
    • Record Type: Research project
    • Source Agency: University of Kentucky, Lexington
    • Contract Numbers: KYSPR 20-596
    • Files: RIP, STATEDOT
    • Created Date: Jul 17 2019 1:37PM