Many construction projects require the use of traffic barriers to adequately protect the motoring public and construction workers. Geometric and operational restrictions in these work zones frequently … [Read more...] about Recommended Practices for Use of Traffic Barrier and Control Treatments for Restricted Work Zones
Facilities
Updated Capacity Values for Short-Term Freeway Work Zone Lane Closures
Recommendations on estimating the capacities of short-term freeway work zone lane closures are presented. The recommendations are based on 45 hr of capacity counts at 33 work zones in Texas between … [Read more...] about Updated Capacity Values for Short-Term Freeway Work Zone Lane Closures
Speed Change Distribution of Vehicles in a Highway Work Zone
In response to roadway geometry and traffic control devices, motorists may change their speeds within a work zone. Speed profile data for 102 automobiles (cars and vans) and 49 trucks, which traveled … [Read more...] about Speed Change Distribution of Vehicles in a Highway Work Zone
Temporal Speed Reduction Effects of Drone Radar in Work Zones
Three experiments were conducted to evaluate the effectiveness of using drone (passive or unmanned) radar guns on vehicle speeds in work zones. Experiment 1 was an exploratory study to determine the … [Read more...] about Temporal Speed Reduction Effects of Drone Radar in Work Zones
Modification of QUEWZ Model to Estimate Fuel Costs and Tailpipe Emissions
Traffic congestion created by urban highway construction and rehabilitation activity imposes substantial cost burdens on highway users. In their attempts to quantify and predict such costs, … [Read more...] about Modification of QUEWZ Model to Estimate Fuel Costs and Tailpipe Emissions
Accidents at Entrance Ramps in Long-Term Construction Work Zones
Presented in this paper is an analysis of accidents in entrance ramp areas on two long-term freeway reconstruction projects in Texas. Entrance ramp areas were compared with nonentrance ramp areas to … [Read more...] about Accidents at Entrance Ramps in Long-Term Construction Work Zones