Title

Quality Of Traffic Flow On Urban Arterial Streets And Its Relationship With Safety

Keywords

Arterials; Driver behavior; Surrogate safety measures; Two-fluid model

Abstract

The two-fluid model for vehicular traffic flow explains the traffic on arterials as a mix of stopped and running vehicles. It describes the relationship between the vehicles' running speed and the fraction of running vehicles. The two parameters of the model essentially represent 'free flow' travel time and level of interaction among vehicles, and may be used to evaluate urban roadway networks and urban corridors with partially limited access. These parameters are influenced by not only the roadway characteristics but also by behavioral aspects of driver population, e.g., aggressiveness. Two-fluid models are estimated for eight arterial corridors in Orlando, FL for this study. The parameters of the two-fluid model were used to evaluate corridor level operations and the correlations of these parameters' with rates of crashes having different types/severity. Significant correlations were found between two-fluid parameters and rear-end and angle crash rates. Rate of severe crashes was also found to be significantly correlated with the model parameter signifying inter-vehicle interactions. While there is need for further analysis, the findings suggest that the two-fluid model parameters may have potential as surrogate measures for traffic safety on urban arterial streets. © 2011 Elsevier Ltd. All rights reserved. All rights reserved.

Publication Date

9-1-2011

Publication Title

Accident Analysis and Prevention

Volume

43

Issue

5

Number of Pages

1610-1616

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.aap.2011.01.006

Socpus ID

79958239862 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79958239862

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