Analysing the Impact of Traffic Incidents on the Travel Time Reliability of Freeway High-Occupancy Vehicle Lanes

This study aims to examine the impact of traffic incidents occurring on general purpose lanes (GPLs) on the travel time reliability of high-occupancy vehicle (HOV) lanes on freeways and to evaluate the differences of travel time reliability on GPLs and HOV lanes under the same incident conditions. I...

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Bibliographic Details
Published in:Discrete dynamics in nature and society 2018-01, Vol.2018 (2018), p.1-12
Main Authors: Wu, Lingtao, Peng, Yichuan, Tang, Jinjun, Zou, Yajie, Chen, Xianzhe, Jiang, Yuming
Format: Article
Language:English
Subjects:
Empirical analysis
Freeways
High occupancy vehicle lanes
Highways
Impact analysis
Impact strength
Inflow
Metropolitan areas
Paths
Reliability analysis
Reliability aspects
Researchers
Statistical mechanics
Studies
Time functions
Traffic congestion
Traffic control
Traffic flow
Transportation services
Travel time
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Summary:This study aims to examine the impact of traffic incidents occurring on general purpose lanes (GPLs) on the travel time reliability of high-occupancy vehicle (HOV) lanes on freeways and to evaluate the differences of travel time reliability on GPLs and HOV lanes under the same incident conditions. In this paper, an empirical travel time reliability analysis is conducted using the travel time and incident data collected between 2009 and 2012 on Interstate 5 and Interstate 405 of the Seattle metropolitan area. Three incident types (i.e., shoulder incident, single lane incident, and multiple lane incident) are considered. Two measures, percentile-based indicator and inflow–percentile travel time function, are used. The results suggest that incidents result in lower values of travel time reliability for all the measures. The results also show that multiple lane incident type has the most significant impact on the freeway route travel time reliability, while shoulder incident type has the least impact. Generally, HOV lanes have higher travel time reliability than GPLs under the same incident types. The findings in this study provide useful decision support for transportation agencies to improve travel time reliability on freeways.
ISSN:1026-0226
1607-887X
DOI:10.1155/2018/7470645