双车道公路直线路段运行速度模型研究

为了建立直线段运行速度模型,针对直线段运行速度现有模型存在的一些不足,首先通过调查实验研究了车辆在不同长度直线段上的加速度变化特征,表明直线段上车辆的加速度与直线长度、进入直线时的初速度以及期望速度有关,采用统计回归的方法建立了直线段加速度模型.其次通过运动学理论进一步研究了直线段长度、初速度、加速度以及期望速度与运行速度之间的关系,结合调查数据建立了直线路段的运行速度模型.最后通过实地数据对模型进行了验证,结论表明所建模型的适用性良好.

Research on the Operating Speed Models of Tangents of Two-lane Highway

In order to establish the operating speed models of tangents,due to deficiencies of existing models,the changes of acceleration characteristics were analyzed through the survey experiment.Conclusion shows that the acceleration on tangents is related to line length,the speed of previous section and the driver＇s expectations,and the acceleration model on tangents is built through statistical regression method.Then further research of telationship between the lenth of the tangents,the speed of precious section,the driver＇ s expectations and the operating speed is drawn.The operating speed of tangents is established,conbining the survey data.The conclusions supply a theoretic basic to the design method of operating speed.Finally,the field data is analyzed to verify the model,and the conclusion shows that the model has exellent applicability.