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http://dx.doi.org/10.12815/kits.2018.17.1.42

Establishing Probability-Based Warrants for Left-Turn Lanes at Unsignalized Intersections  

Moon, Jaepil (Highway and Transportation Research Institute, Korea Institute of Civil Engineering and Building Tech)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.17, no.1, 2018 , pp. 42-54 More about this Journal
Abstract
This study is to establish the traffic volume-based warrants of left-turn lanes in unsignalized intersections based on a risk probability methodology. This study applied a risk probability of a potential rear-end collision between a left-turn vehicle and the immediately following through vehicle. With the shifted negative exponential model and the compound probability theorem, the risk probability can be expressed as the function of directional volumes, opposing volumes and the percentage of left-turns for a two-lane and four-land highway, respectively. The warrants of installing left-turn lanes on unsignalized intersections were developed with the risk probability. The warrants define the total approaching and opposing volumes to encourage a left-turn lane as a function of operating speed, percentage of left-turn, and number of lanes.
Keywords
risk probability; unsignalized intersections; left-turn lanes; warrants; roads;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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