Impact of buses on the macroscopic fundamental diagram of homogeneous arterial corridors

This paper proposes a modification of the method of cuts to estimate the effect of bus operations on the macroscopic fundamental diagram of long arterial corridors with uniform signal parameters and block lengths. It is found that the impact of buses can be adequately captured by the theory of moving bottlenecks using only the bus average free-flow speed. This speed considers the effects of signals and stops but not traffic conditions and therefore can be calculated endogenously. A formulation is developed to approximate the bus average free-flow speed as a function of bus operational parameters. The authors also found that buses produce an additional capacity restriction that is similar to the ‘short block’ on networks without buses and that can severely reduce corridor capacity. The proposed method is validated with numerical approximations of the corresponding kinematic wave problem.


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  • Accession Number: 01683600
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 13 2018 3:01PM