With　the　increasing　pressure　of　left-turn　vehicles　in　urban　arterials,　multiple　phases　of　signal　control　are　chosen　as　the　main　pattern.　Four　intersections　of　an　arterial　in　Qingdao　city　are　selected　as　the　main　object　of　study.　Each　intersection　is　four-legged　with　a　two-way　eight-lane　major　street　and　two-way　four-lane　minor　street.　Four　patterns　of　phases　and　sequence　are　researched　including　two-phase　control,　Split　Phasing,　leading　left-turn　phasing　and　lagging　left-turn　phasing　in　major　street.　1024　simulation　tests　are　designed　by　using　PASSER　software.　Average　delay　of　each　vehicle　is　calculated　by　using　the　hill-climbing　method.　The　optimized　results　of　different　combined　phases　and　sequences　with　5,　10,　15,　and　20　left-turn　volume　are　given　as　the　base　of　arterial　coordination　control　of　local　agency.　©　2011　ASCE.