TTI Research Supervisor:
Nauman Sheikh, P.E.
Texas Transportation Institute
Texas A&M University System
College Station, Texas 77843-3135
(979) 845-8955 [email protected]
Pooled Fund Technical Representative:
Assistant Bridge Design Administrator Bridge and Structural Design Section
Louisiana Transportation Center
1201 Capitol Access Road
P.O. Box 94245
Baton Rouge, LA 79084-9245
(225) 379-1323 [email protected]
The objective of this research was to develop and crash test a transition barrier design that can be used to transition from the pinned-down F-shape temporary concrete barrier placed on concrete to a permanent concrete barrier. The transition was developed to meet American Association of State Highway and Transportation Officials <em>Manual for Assessment of Safety Hardware</em> (<em>MASH</em>) test level 3 criteria, using an existing 32-inch tall pinned-down anchored F-shape temporary concrete barrier design connected to a 42-inch tall single slope rigid concrete barrier.
In the MASH test level 3 crash test, the transition for the anchored temporary concrete barrier placed on concrete, to the rigid single slope concrete barrier contained and redirected the 2270P vehicle. The vehicle did not penetrate, underride, or override the installation. Maximum dynamic and static deflections of the transition were 5.7 inches and 2.5 inches, respectively. No detached elements, fragments, or other debris from the test article were present to penetrate or show potential for penetrating the occupant compartment, or to present hazard to others in the area. Maximum occupant compartment deformation was 3.625 inches in the floorpan on the driver’s side. The 2270P vehicle remained upright during and after the collision event.
Transition After MASH Test 3-21
Maximum roll and pitch angles were 13 degrees and 8 degrees, respectively. Occupant risk factors were within the limits specified in MASH. The 2270P vehicle exited the barrier within the exit box. The transition for anchored temporary barrier to rigid concrete barrier performed acceptably according to the MASH criteria required for test 3-21 for transitions.