Two Network Structure Indicators for Conventional Public Transit

The significance of network structure indicators for the planning and management of conventional public transit is widely acknowledged. In order to improve and enrich the conventional public transit assessment system, two network structure indicators are proposed. Firstly, according to the obvious defects lying in the traditional no-linear coefficient, the realistic no-linear coefficient yRNI,a modified no-linear coefficient indicator, is put forward, which takes into account the effects of barriers in a city. Secondly, to cover the gap of an indicator which can reflect the coverage homogeneity of a transit network, the length dimension LD is proposed on the basis of Fractal Theory. Finally, a case study is applied to verify the validity and practicability of the two indicatorsin problem diagnosis using regression analysis. The results validate that yRN｜ can evaluate the detour of bus lines more reasonably than the previous no-linear coefficient because it reflects the layout of bus lines, and Ld can represent the rate of change of the network density, adding a new member to the scheme of network structure indicators for public transit.