To　reduce　the　vehicle　delay　effectively,　a　coordinated　signal　control　method　for　arterial　road　of　adjacent　intersections　has　been　proposed,　which　is　based　on　the　genetic　algorithm　improved.　The　method　takes　the　signal　coordinated　control　system　for　arterial　road　of　adjacent　intersections　as　the　research　object,　by　analyzing　the　signal　states　encountered　by　the　head　and　tail　of　fleet　before　the　crossing　of　the　arterial　road,　and　adopting　the　minimum　total　delay　of　waiting　queue　team　as　the　performance　index,　to　establish　the　coordinate　control　system　optimization　model　for　arterial　road,　in　which　a　cycle　length,　signal　timing　and　phase　difference　are　optimization　parameters.　And　the　method　introduce　minimum　spanning　tree　clustering　idea　to　improve　the　defects　of　the　standard　genetic　algorithm　(Standard　Genetic　Algorithms,　SGA),　and　then　optimizes　the　aforementioned　the　coordinate　control　system　optimization　model　for　arterial　road.　The　experiment　shows　that　the　results　obtained　by　the　improved　genetic　algorithm　are　better　than　the　ones　obtained　by　standard　genetic　algorithm　and　traditional　algebraic　method　respectively.　(C)　2016　Elsevier　GmbH.　All　rights　reserved.