01352854

Component

https://doi.org/10.3141/2229-03

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

Incidents on urban freeways are a leading cause of traffic congestion. Secondary incidents can occur in the vicinity of primary incidents, complicating traffic operations. While studies have examined factors associated with incident duration and secondary incident occurrence, a significant number of spatiotemporal variables in incident management are often overlooked. For example, how soon does a secondary incident happen after a primary incident? How far is the secondary from the primary incident? What factors are associated with near versus far secondary incidents? To answer these questions, a deeper analysis of primary and secondary incidents was conducted on the basis of a unique 2008 incident and roadway inventory database for Hampton Roads, Virginia. Time gaps and distances for secondary incidents in the same direction were analyzed with appropriate statistical methods. This research contributes to incident management by rigorously analyzing time-gap distances between primary and secondary incidents and exploring their implications. The results can support more informed planning and operational decisions needed to respond in complex incident situations.

01352852

11-2732

English

pp 19-27

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167383

Print

Figures (4) ; References (13) ; Tables (4)

Freeways; Incident management; Statistical analysis; Traffic congestion; Traffic incidents; Urban areas

Secondary incidents; Separation distance; Spatiotemporal traffic dynamics; Time gaps

Hampton Roads (Virginia)

Highways; Operations and Traffic Management; I71: Traffic Theory

TRIS, TRB, ATRI

Sep 27 2011 2:40PM

• Analysis of Queue Estimation Methods Using Wireless Magnetic Sensors
• Analyzing Clearance Time of Urban Traffic Accidents in Abu Dhabi, United Arab Emirates, with Hazard-Based Duration Modeling Method
• 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
• Quantification of Nonrecurrent Congestion Delay Caused by Freeway Accidents and Analysis of Causal Factors
• 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
• Validation Techniques for Region-Level Microscopic Mass Evacuation Traffic Simulations