The standard road plans contained in this manual (commonly referred to as the "Red Book") have been developed to show standardized design features, construction methods and approved materials to be … [Read more...] about Iowa DOT Standard Road Plans
Barriers (Roads)
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
Guidelines for Positive Barrier Use in Construction Zones
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
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