01555298

Component

https://doi.org/10.3141/2485-07

Freeway work zone capacity has been the focus of significant research, but most studies were limited to specific geographic regions or work zone configurations or both. To date, no work zone predictive capacity model exists for U.S. freeways that is based on a geographically representative data set or sensitive to key geometric and operational attributes of the work zone. This paper proposes a new capacity model for freeway work zones, developed from nationwide field data fused with data obtained from an in-depth review of archived literature of prior work zone capacity studies in the United States. The proposed model estimates work zone capacity as a function of the lane closure severity index, barrier type, area type, lateral clearances, and daytime or nighttime work conditions. The model was successfully validated with 25% of the combined data that were not used for the model development. In addition, findings from literature archives suggested a 13.4% difference between prebreakdown, uninterrupted capacity and the ensuing queue discharge rate. The developed capacity model is intended to be incorporated into the next release of the Highway Capacity Manual and provides important insights on the relative effects of work zone configuration and other variables on the expected capacity of freeway work zones.

01577149

15-2010

English

pp 51–60

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309295826

Print

Figures (2) ; References (29) ; Tables (7)

Data fusion; Freeways; Highway capacity; Regression analysis; Traffic queuing; Work zones

United States

Data and Information Technology; Highways; Maintenance and Preservation; Operations and Traffic Management; Safety and Human Factors; I72: Traffic and Transport Planning; I73: Traffic Control

TRIS, TRB, ATRI

Dec 30 2014 12:43PM

• Approaches to Adaptive Lighting on Roadways
• Development of Freeway and Interchange Safety Performance Functions with Respect to Roadway Lighting: A Pilot Study
• Evaluation of Mobile Work Zone Alarm Systems
• Exploration of Work Zone Crash Causes and Implications for Safety Performance Measurement Programs
• Improved Business Driveway Channelizing Treatments in Work Zones
• Investigating Maximum Intensities for Yellow Rapid-Flashing Beacons at Night
• Motorists’ Speed Response to Nonvariable and Variable Work Zone Speed Limits and Other Work Zone Conditions
• Relationship Between Roadway Illuminance Level and Nighttime Rural Intersection Safety
• Speed Control Method for Highway Tunnel Safety Based on Visual Illusion