Offsetting opposing left-turn lanes at intersections has been found to improve the driving performance of older drivers. Previously recommended guidelines for offsetting opposing left-turn lanes were based on observations of left-turning vehicles for only one offset condition. The guidelines developed in the present research are based on left-turning vehicle positioning and maneuver-time data collected at intersections with left-turn lane offsets of from –4.3 to 1.8 m (–14 to 6 ft). A 1.2-m (4-ft) offset was found to provide unrestricted sight distances in most situations.
Guidelines for Offsetting Opposing Left-Turn Lanes on Divided Roadways
Transportation Research Record
Transportation Research Record: Journal of the Transportation Research Board ; 1579 , 1 ; 43-52
1997-01-01
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Guidelines for Offsetting Opposing Left-Turn Lanes on Divided Roadways
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