Development of a Low-Profile Portable Concrete Barrier (TTI-1992-14)

A low-profile portable concrete barrier (PCB) has been developed for use in low-speed (approximately 45 mph [73 km/h] or less) work zones. The purpose of the low-profile barrier is to both shield the work zone and redirect errant vehicles while improving visibility. The low-profile barrier has a total height of only 20 inches (50.8 cm), while most current PCB's have a total height of 32 inches (81.28 cm). The primary advantage of the reduced height of the low-profile PCB, is that driver visibility is significantly increased. This enhanced visibility should provide drivers with safer conditions, and should reduce the number of accidents. The performance of the barrier was demonstrated through the results of two full-scale crash tests. Based on the results of these crash tests, the low-profile barrier is recommended for immediate use under appropriate conditions.