城市居民出行强度初探

出行强度指标用于衡量城市居民出行需求量,亦即用于衡量居民出行给交通系统造成多大的压力。指标应包含出行量与出行时耗的信息,因此,出行强度定义为出行次数与单程出行平均时耗的乘积。出行强度随城市规模的扩大而增加;在城市内部,居民的出行强度统计值趋于相近;出行强度的增加,导致交通量的增加、高峰期的延长以及交通方式的改变。出行强度可以作为城市交通系统规划的指示性依据。

TOWARDS THE INTENSITY OF TRIP ACTIVITIES MADE BY URBAN INHABITANTS

Intensity of trip activities an index used to measure the daily trip demand of urban inhabitants as well as the daily passenger traffic pressure on urban transport system, must include the information about trip frequency and trip-duration. It should be defined as the product of the daily trip frequency and the average duration per trip. It increases with the expansion of urban spatial size. The statiatical values of the index among the different categories of inhabitants tend to be approximate within an urban area. The increase of the intensity would result in the growth of traffic, the. prolongation of peak-hours and the change of trip modes. The index can be used as an important parameter in urban transport planning process.