01506338

Component

http://onlinepubs.trb.org...ces/2011/RSS/3/Zhong,L.pdf

It is well known that traffic flow characteristics greatly affect roadway safety. Operating speed under various traffic flow rates or densities plays a role in crash occurrence and type of crash. Using crash and traffic flow data from a freeway in China, this paper explores the relationship between traffic flow and safety. In addition to flow rate, the study also reveals the relationship between safety and other traffic flow characteristics such as heavy vehicles, speed gap between types of vehicles, and V/C. It is discovered that the impact of traffic flow on safety is complicated because of the complex relationship among flow parameters. This paper developed several mathematical models that describe the combined effects of traffic flow parameters on crash occurrences, which could enable engineers to identify and implement effective crash countermeasures to improve freeway safety at present.

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01501394

English

11p

2011

3rd International Conference on Road Safety and Simulation

Digital/other

Figures; References; Tables

Countermeasures; Crash data; Crash rates; Freeways; Highway safety; Speed; Traffic flow; Traffic flow rate

China

Highways; Safety and Human Factors; I80: Accident Studies

TRIS, TRB, ATRI

Jan 31 2014 11:48AM