Study on unblocked reliability of Beijing, China, urban road network

Abstract

The urban road network is the basis of urban transportation and its reliability plays an extremely important role in relieving congestion. The present study took unblocked reliability as the index for a road network reliability study. As the saturation cannot fully reflect the traffic situation, first, the formula for unblock reliability was improved and second, the minimal road set algorithm in graph theory was used to simplify the road network as a simple series–parallel network, and by combination with real-time data of the road network in Beijing, China, a calculation method of urban road network reliability was established. Finally, as an extension of the unblocked reliability evaluation, a sensitivity analysis was conducted for each road network and the critical sections in the road network were determined. The simulation results show that the improved unblocked reliability can sensitively reflect the traffic congestion situation and sensitivity analysis based on the unblocked reliability evaluation can effectively locate the sections in the road network that are critical for solving the congestion problem. The results of the study provide reasonable decision-making and theoretic support for traffic management departments.

Identification of key road sections based on mobility reliability of road network

“…In previous studies, road network connectivity reliability and capacity reliability were mostly used as indicators for research, and the research on key road sections considering mobility reliability needs to be further studied. As an improved index of road network connectivity, mobility reliability more fully considers the actual traffic capacity of urban network and randomness of traffic demand [12] . This paper studies key road sections from two aspects of weakness and importance, introduces the road network mobility reliability index, and establishes a key road section identification model based on mobility reliability.…”

Editorial

“…Elasticities for passenger waiting time and invehicle time are used to assess actual passenger reactions to the attractiveness for different public transport technologies at different levels of demand. Wang et al (2015) consider and investigate the nature of congestion and how reliability plays an important role is its alleviation. follow these papers by introducing a new method to the original social force model when looking at the design and evacuation of highly crowded places such as underground stations.…”