Traffic Volume Thresholds for Requiring Right Turn Lanes and Treatments on Two-Lane Roads

Status:  Complete
Report Date:  07/28/2008

Summary:

Mn/DOT's right turn lane volume warrants were generally based on qualitative assessment rather than quantitative analysis, resulting in inconsistent application of right turn lanes and an inability to ensure cost-effective intersection design. This research project developed procedures for establishing and applying volume-based warrants that strike a balance between the cost to build a right turn lane or treatment and the money it will save in safety and operational benefits.

Final Report:


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