MASH test nos. 3-11 and 3-10 on a non-proprietary cable median barrier.
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2016-05-17
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Edition:Final report
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Abstract:The Midwest States Pooled Fund has been developing a new non-proprietary cable median barrier. This system
incorporates four evenly spaced cables, Midwest Weak Posts spaced at 8 to 16 ft (2.4 to 4.9 m) intervals, and a bolted,
tabbed bracket to attach the cables to each post. Full-scale crash testing was needed to evaluate the barrier’s safety
performance. According to the Manual for Assessing Safety Hardware (MASH) updated/proposed testing matrix for cable
barriers installed within a 6H:1V or median ditch, a series of eight full-scale tests are required to evaluate the safety
performance of a system. A ninth test is required to establish the working width for systems with variable post spacing.
Three full-scale crash tests were performed. Test no. MWP-4 was conducted according to MASH test no. 3-11 and
utilized a 2270P pickup truck impacting the barrier on level terrain. The vehicle was contained by the barrier, and the test
was deemed acceptable. Test no. MWP-6 was conducted according to MASH test no. 3-10 and utilized a 1100C passenger
car impacting the barrier on level terrain. The vehicle was contained and redirected by the system. However, the system
posts penetrated the occupant compartment through tearing and rupture of the vehicle floor board, and the test was deemed
unacceptable. Test no. MWP-7 was also conducted with a 1100C vehicle according to MASH test no. 3-10. Alterations
were made to the system posts. Although the vehicle was contained by the system, occupant compartment penetration by
line posts was again observed. Test no. MWP-7 was deemed unacceptable.
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