Based　on　a　comprehensive　traffic　congestion　analysis　database,　this　paper　conducts　a　causative　analysis　for　urban　expressway　congestion.　Firstly,　based　on　the　statistical　analysis　method　of　nonparametric　test,　the　influence　of　each　variable　on　traffic　congestion　is　analyzed　under　the　factors　such　as　traffic　control　devices,　road　conditions,　aggressive　driving　behavior,　and　environment.　After　that,　based　on　structural　equation　modeling,　the　overall　influence　differences　of　various　factors　are　derived,　the　important　variables　of　various　factors　are　inferred,　the　comparison　of　safety　risk　and　traffic　congestion　influencing　factors　is　initially　derived,　and　the　solution　measures　of　traffic　congestion　on　urban　expressways　are　proposed　accordingly.　©　ASCE.