Based　on　the　analysis　of　the　actual　use　of　urban　expressway　entrance　control　model,　the　method　of　entrance　control　based　on　the　task　balancing　control　(TBC)　is　introduced　in　this　paper.　The　measure　of　effectiveness　(MOE)　is　set　as　the　indicator　of　TBC　model,　and　the　control　model　on　the　systems　with　multiple　parallel　plants　(MPP　system)　is　integrated　with　the　ALINEA　model.　This　model　focuses　on　the　balance　of　expressway　and　auxiliary　traffic　demand.　To　improve　the　practicability　of　the　model,　this　paper　proposes　two　improvements:　asymmetry　parameters　and　local　reduction　coefficient　in　the　weak　interacting　conditions,　and　also　applies　the　improved　queue　induction　model　of　NEMA　to　control　overflowing.　This　TBC　model　is　validated　on　the　viaduct　of　Jinzhai　Street　in　Hefei　city,　and　the　travel　time　of　expressway　is　reduced　by　9.09-9.44.　Finally,　the　adaptability　of　the　TBC　model　under　different　conditions　is　presented.　This　model　has　significant　effect　of　improving　local　congestion,　especially　during　the　rush　hour　under　different　crowded　degree　between　expressway　and　auxiliary　road.　©　2010　China　Association　for　Science　and　Technology.