Study on Optimization of Correction Coefficient of Large Trucks in Lhasa
With the development of tourism in Tibet,the proportion of tourist buses is also growing.The correction coefficient of large vehicles is a decisive parameter for calculating the road traffic capacity.It is extremely necessary to improve the road traffic capacity and optimize the correction coefficient of tourist buses and other large vehicles.At present,the independent variable of the correction coefficient of large trucks adopted at home and abroad is the pro-portion of large trucks,without considering the impact of speed.This paper optimizes the traditional correction coeffi-cient of large trucks through VISSIM simulation.First,VISSIM was used to determine the basic model of Lhasa's cor-rection coefficient of large trucks,then the speed correction was carried out and the speed correction model was found,and the unique correction coefficient applicable to Lhasa was obtained:fhv=(1-1.2213%HV)×[0.2894ln(V)+0.1611],compared with the traditional correction coefficient of large trucks,the independent variables of this model are large truck rate and speed,which is more accurate and consistent with the actual situation of Lhasa.
Correction coefficient of large trucksSpeed correction coefficientLhasa
NETL
NSTL
万方数据
