7Chen H C,Schonfeld P. Work zone lengths for a four-lane road with an alternate route [R]. Washington DC:Transportation Research Board?2003.
8Chien S, Schonfeld P. Optimal work zone lengths for four-lane highways[J], Journal of Transportation Engineering, 2001 ,127(2):124-131.
9Byrd P S,Pesti G,Jessen D S,et al. Traffic flow characteristics of the late merge work zone control strategy [ R ]. Washington DC: Transportation Research Board,1999.
