美国联邦公路局路阻函数探讨

Considerations on Problems in the BPR Function

路阻函数在交通分配过程中左右着路径的选择,目前广泛采用的路阻函数是美国公路局提出的BPR函数,但在交通分配的实践过程中使用美国公路局推荐BPR参数得到的结果并不理想。论文对国内外关于BPR函数的修正模型研究进行了介绍;分析了现存BPR模型的优点与缺陷;提出了BPR函数适用情况的思考。

Impedance Function is a key factor to traffic assignment, and BPR function is one widely used, but the result is not satisfying when BPR function is used in some cases with its default parameter which are commended. The thesis introduces related modified model of BPR function; analyses the deficiencies exist in the present model; and points out the adaptable condition of BPR function.