CRASH TEST AND EVALUATION OF PRECAST CONCRETE MEDIAN BARRIER
Median barriers are used on high-volume, high-speed traffic facilities to prevent errant vehicles from crossing a median and conflicting with the opposing traffic strem. A secondary function for some designs of median barriers is to minimize the glare of opposing headlights. The cast-in-place Concrete Median Barrier (CMB) has proven to be an effective and economical barrier in Texas and other states. Investigation into the use of a precast concrete median barrier stemmed from the interest involved in utilizing a barrier to be prefabricated concurrently with roadway construction. This more effective utilization of work force as well as early project completion and acceptance could provide measurable potential savings to both contractor and the State. In addition, when this barrier is installed on existing facilities the traffic may be disrupted for a considerable period of time if it is cast-in-place. Consequently, there is a need for a Precast Concrete Median Barrier (PCMB) which can be quickly installed on active facilities with a minimum period of traffic disruption. In order for a precast concrete median barrier to function properly in redirecting vehicles, the relatively short precast sections must be adequately connected together after they are placed in the highway median. Engineers of the Texas State Department of Highways and Public Transportation and the Texas Transportation Institute developed working drawings for precast sections of a PCMB and two connection details. Full-scale crash tests were conducted on the PCMB and connections in order to verify the stability and strength of the installation.
- Research completed in cooperation with FHWA and Texas State Dept. of Highways and Public Transportation.
Arlington, TX USA 76011
- Hirsch, T J
- Marquis, E L
- Publication Date: 1975-10
- Features: Appendices; Figures; References; Tables;
- Pagination: 48 p.
- TRT Terms: Collisions; Impact tests; Median barriers; Precast concrete; Testing; Traffic volume
- Subject Areas: Design; Highways; Research;
- Accession Number: 00131377
- Record Type: Publication
- Report/Paper Numbers: TTI-2-10-75-223-1 Intrm Rpt.
- Contract Numbers: 2-10-75-223
- Files: TRIS
- Created Date: May 14 1976 12:00AM