The need for positive barriers in construction zones is now based on individual judgment, and there is an expressed need for objective barrier placement criteria. The number, diversity, and … [Read more...] about Guidelines for Positive Barrier Use in Construction Zones
Barriers (Roads)
Optimum Design of Pin and Loop Portable Concrete Barrier Connectors
Portable concrete barriers provide positive protection for highway work zones. Since the connection is often structurally the weakest part of the barrier system, connector design is a critical … [Read more...] about Optimum Design of Pin and Loop Portable Concrete Barrier Connectors
International Harmonization of Testing and Evaluation Procedures for Roadside Safety Features – German Testing Procedures
This Circular contains the proceedings of a workshop sponsored by the Transportation Research Board (TRB) Committee A1A04 on Roadside Safety Features and the Federal Highway Administration. The … [Read more...] about International Harmonization of Testing and Evaluation Procedures for Roadside Safety Features – German Testing Procedures
Development of a Low-Profile Portable Concrete Barrier
A low-profile portable concrete barrier (PCB) has been developed for use in low-speed [approximately 45 mph (73 km/hr) or less] work zones. The purpose of the low-profile barrier is to shield the work … [Read more...] about Development of a Low-Profile Portable Concrete Barrier
Recommended Practices for Use of Traffic Barrier and Control Treatments for Restricted Work Zones
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
Report on Emergency Access Openings in Soundwalls and Concrete Median Barriers
House Resolution No. 15, adopted March 30, 1991, requested that the Department of Transportation (Caltrans) conduct a study to determine the need and consider standards for installing removable … [Read more...] about Report on Emergency Access Openings in Soundwalls and Concrete Median Barriers