关键词: 城市交通, 轨道交通, 负荷评估, 标准差率, 大小交路, 不成对行车

Abstract:

The evaluation of line loading is an important part of rail transit scheduling and management. This paper points out the issue that using the single average parameter cannot fully reflect the load distribution deviation on the transit lines. Therefore, focusing on matching passenger flow and transport capacity of urban rail transit lines, this paper proposes a line loading evaluation model with two indexes of mean value and coefficient of variation and takes train loading factor as evaluation unit. The mean value is equal to the weighted sum of each evaluation unit which represents the contribution of each evaluation unit to the line loading level. The coefficient of variation reflects the evenness of line loading. The model analysis shows that increasing the transport capacity of the sections or direction with large passenger flow properly can improve the evenness of line loading. The case study shows that when directional uneven coefficient of passenger flow exceeds 1.4, the capacity optimization measures should be considered to improve the capacity utilization; The mode of full-length and short-turn routing and bidirectional uneven operating can improve the evenness of line loading to some extent.

Key words: urban traffic, rail transit, loading evaluation, coefficient of variation, full-length and short-turn routing, bidirectional uneven operating