| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 108736 | Journal of Transportation Systems Engineering and Information Technology | 2008 | 6 Pages |
Urban road grade proportion, the length ratio of different grade roads, is related to road function, and the urban road function is guaranteed by the reasonable road grade. In this paper, we discusses urban road grade configuration in respect of trip mode, and we also proposes a new method to determine road grade levels based on the probability of trip time consumption according to equilibrium mechanism. To predict the reasonable urban road grade, we adopt two approaches. In the first, we analyze the probability distribution of trip time consumption at different traffic modes and calculate the required volume of every grade road based on the relationship between the time scope of a trip mode and the function of a grade road. In the second, according to the equilibrium theory between supply and demand, we use the capacity of road network obtained from time and space theory to predict the appropriate length of every grade road. In addition, we discuss the calibration of key parameters in this method. In the end, we put this method into practice by analyzing the road grade proportion in the city of Changzhou, China. The predicted results turned out to be reasonable and satisfactory.
