Abstract
This article details findings from an Institute of Transportation Engineers Arizona Section Traffic Safety Committee Project that aimed to compare accident rates at intersections with leading left-turn phasing to accidents at intersections with lagging left-turn phasing. Eight intersections with lead left turning and 14 intersections with lag left turning were studied. Findings from this research suggest that decisions concerning the use of lead or lag left-turn phasing should be based on considerations other than left-turn head-on accident potential. (Author/Publisher)