4CUNAGIN W D,MESSER C J.Passenger-car equivalents for rural highway[C] // Highway Research Record 905.US Highway Research Board,1983:61-68.
5CRAUS J,POLUS A,GRINBERG.A revised for te determination of passenger car equivalencies[J].Transportation Research 14A,1980:241 -246.
6HUBER M J.Estimation of passenger-car equivalents of trucks in traffic stream[C] // Highway Research Record 869.US Highway Research Board,1982:60-70.
7JACBS F.Quens and overtaking on two-lane road[C] // On Transportation and Traffic Theory.1974:181-202.
8TAYLOR M A P,MILLER A J,OGDEN K W.A compersion of some bunching modeles for rural traffic[C] // Transportation Research8.1978:1-9.
9ST JOHN A D,KOBETF D R.Grade effects on traffic flow stability and copacity[R].US Highway Research Board,1978.
10WALKER W P.Infience of bridge widths on transverse position of veicles[C]// Transportation Research Record 631.Transportation Research Board,1941:10-16.
