7.5 道路阻抗函数理论与应用研究.pdf

Vol.21　No.9 公　路　交　通　科　技 2004 9 JOURNAL OF HIGHWAY AND TRANSPORTATION RESEARCH AND DEVELOPMENT :1002-0268 (2004)09-0082-04 1 2 1 王元庆, 周　伟, 吕连恩 (1. , 　 　710064;2., 　100029) :在广义交通阻抗概念下, 提出综合路阻函数模型。 把时间、 费用、 交通流、 收费站和城市节 影响通过参数标 定建立起综合函数关系, 避免了一般综合性路阻函数费用与时间相互转换过程中, 需要时间价值参数这 一难定量的指 标。将建立的综合路阻函数模型, 通过等式关系转化成交通规划软件T ansCAD 内部函数形式, 以实现模型与交通规 划软件结合应用, 弥补了本文建立的路阻函数没有对交叉口进行专项考虑的缺陷。 并用河北唐山的实例说明该函数模 型的可行性。 结果表明本文方法较常用的BPR 曲线拟合交通量误差有显著降低。 :路阻函数;极大似然估计法;标定;T ansCAD 软件 :U491　　　　　　:A Theory and Application Study of the Road Traffic Impedance Function 1 2 1 WANG Yuan-qing , ZHOU Wei , L VLian-en (1.Chang an Unive sity T affic Enginee ing Institute, Shaanxi 　Xi an 　710064, China; 2.China Academy of T anspo tation Sciences, Beijing　100029, China) Abstract:Unde the conception of gene al t affic impedance, this pape b ings out the agg egative oad impedance function model to build up the agg egative function elationship of time, toll, t affic flow, the effect of tollbooth and city node as a whole th ough calib at- ing pa amete s.This pape avoids calib ating time value pa amete which is difficult to confi m du ing the complex p ocess of the mutual conve sion between the toll and time as usual.In o de to apply the gene al t affic impedance model and t affic planning softwa e togethe , this pape conve ts the gene al t affic impedance model into the built-in function of T ansCAD th ough fo mula t ansfo mation.The defect of unconside ed c ossing p oblem is atoned specially.An example of Tangshan in Hebei p ovince is given to demonst ate the effect of this pape s