01352853

Component

https://doi.org/10.3141/2229-02

http://scholar.google.com...hung&publication_year=2011

The objectives of this study are twofold: to quantify nonrecurrent congestion delay caused by traffic accidents that occur on freeways and to analyze the causal factors by different types of accidents. Unlike previous studies, this study proposes an analytical procedure to estimate congestion impact by using the difference between speed reduced by a traffic accident and accident-free normal flow speed. The proposed method is demonstrated by a case study using accident data derived from 27 freeways in South Korea in 2008. Ultimately, the method can develop a performance measure for evaluating transportation policies and planning level analyses associated with the design of transportation systems and preparation of operating plans for safety, as well as for quantitatively evaluating deployed transportation projects or technologies. Moreover, the results from statistical analyses can potentially be useful in making strategic plans and formulating mitigation measures for reducing nonrecurrent congestion delay caused by accidents on the South Korean freeway system.

01352852

11-0827

English

pp 8-18

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167383

Print

Figures (7) ; Maps (1) ; References (29) ; Tables (7)

Case studies; Freeway operations; Freeways; Nonrecurrent congestion; Statistical analysis; Strategic planning; Traffic crashes; Traffic mitigation; Traffic speed

South Korea

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Sep 27 2011 2:25PM

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• Decomposition of Travel Time Reliability into Various Sources: Incidents, Weather, Work Zones, Special Events, and Base Capacity
• Exploiting the Capacity of Managed Lanes in Diverting Traffic Around an Incident
• Managing Highways for Better Reliability: Assessing Reliability Benefits of Ramp Metering
• Novel Freeway Traffic Control with Variable Speed Limit and Coordinated Ramp Metering
• Preliminary Evaluation of Operational Performance of Different Types of High-Occupancy Vehicle Facilities in California: Continuous Access Versus Limited Access
• Quantifying the Attractiveness of High-Occupancy Toll Lanes with Traffic Sensor Data Under Various Traffic Conditions
• Safety Benefits from Deployment of Open Road Tolling for Main-Line Toll Plazas in Florida
• Spatiotemporal Patterns of Primary and Secondary Incidents on Urban Freeways
• Validation Techniques for Region-Level Microscopic Mass Evacuation Traffic Simulations