路面行驶质量差异的当量出行时间费用

Equivalent Travel Time Cost of Road Quality

摘要:

以国际平整度指数为中间指标，构建路面行驶质量指数与出行时间费用之间的定量关系，给出路面行驶质量变化带来的当量出行时间费用差异.通过已有四分之一车模型的动力方程，以高速公路为研究对象，对选定的50条道路在13个速度下的国际平整度指数进行仿真计算.以国际平整度指数为中间指标，利用已有不同速度下平整度指数与行驶质量指数的关系，给出每条道路在不同速度下的行驶质量指数.以80 km?h-1的路面行驶质量指数为基准，给出了路面行驶质量指数差异与达到相同行驶质量时的行驶车速差异之间的关系.分析结果表明，两者具有良好的相关性.路面行驶质量变化对出行时间费用有显著影响，在出行选择行为分析、道路维修养护效益评估等相关研究中应予以考虑.

Abstract:

Using IRI (international roughness index) as a bridge, the quantitative relationship between RQI (ride quality index) and travel time cost was established. First, at different speeds, IRIs of fifty different roads were simulated by the use of dynamic equation of quartercar model. Next, the relationship between RQI and speed was obtained by the analysis of the relationship between RQI and IRI. Finally, the difference of RQIs at the same speed of 80 km?h-1 and the difference of speeds at the same RQI for any two of fifty roads were calculated. Good correlations were found between them. This result shows that the influence of RQI on travel time cost should not be ignored in the study of the behavior of travel choice or in the study of benefit evaluation of road maintenance.