On the existence of network Macroscopic Safety Diagrams: Theory, simulation and empirical evidence.

ABSTRACT: Recent studies have proposed using well-defined relationships between network productivity and accumulation-otherwise known as Network or Macroscopic Fundamental Diagrams (network MFDs)-to model the dynamics of large-scale urban traffic networks. Network MFDs have been used to develop a variety of network-wide traffic control policies to improve a network's operational efficiency. However, the relationship between a network's MFD and its safety performance has not been well explored. This study proposes the existence of a Macroscopic Safety Diagram (MSD) that relates safety performance (e.g., likelihood of a crash occurring or number of vehicle conflicts observed) with the current network state (i.e., average density) in an urban traffic network. We theoretically posit a relationship betwe

SUBMITTER: Alsalhi R 

PROVIDER: S-EPMC6080770 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature