Design Standards for Unobstructed Sight Lines at Left-turn Lanes

Status:  Active
Project Start Date:  07/09/2018


Previous studies have shown that improving sight lines for left-turning traffic can improve the safety of intersections and reduce total crashes. Limited sign distance can also increase critical gaps and reduce capacity of left-turn movements. Developing Minnesota-specific guidelines to improve sight lines at intersections can improve capacity while decreasing vehicle delay, travel time, fuel consumption, and environmental pollution.

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