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.

Language

• English

Project

• 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

• TRT Terms: Auxiliary lanes; Highway design; Left turns; Passing lanes; Traffic queuing; Turning lanes
• Subject Areas: Design; Highways; Operations and Traffic Management;

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