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
Barriers (Roads)
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
Salvaged and/or re-galvanized guardrail on construction projects
Alabama allows the use of salvaged guardrail as indicated on plans for guardrail reset. -Under what circumstances will the state agency authorize its use? Guardrail to be salvaged will be indicated … [Read more...] about Salvaged and/or re-galvanized guardrail on construction projects
Salvaged and/or re-galvanized guardrail on construction projects
MnDOT does on occasion salvage existing guardrail and reinstall it in lieu of installing new guardrail. However, MnDOT does not re-galvanize existing guardrail for reuse. Under what circumstances … [Read more...] about Salvaged and/or re-galvanized guardrail on construction projects
A Truck-Mounted Portable Maintenance Barrier
A truck-mounted portable maintenance barrier is described. The barrier is designed to provide a reasonable degree of positive protection in short-duration work zones where it is not practical to use … [Read more...] about A Truck-Mounted Portable Maintenance Barrier