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Citation |
Rowhani P, Glauz D, Stoughton RL. Transp. Res. Rec. 1993; 1419: 35-42. |
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Copyright |
(Copyright © 1993, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
unavailable |
PMID |
unavailable |
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Abstract |
Two vehicle crash tests were performed on a retrofit concrete glare screen (CGS) slipformed on top of an existing concrete safety shape barrier 0.81 m (32 in.) high. The CGS is intended as a replacement for the current standard expanded metal mesh glare screen. This CGS is 0.51 m (20 in.) high, 0.15 m (6 in.) thick at the base, and tapers slightly to 0.13 m (5 in.) thick at the top. Reinforcing consists of two longitudinal #4 bars tied to vertical #5 hoops (inverted U-shaped stirrups). At the base of the glare screen is a 19-mm (3.4-in.) chamfer to match that at the top of the concrete barrier. The two test vehicles included a pickup truck ballasted to 2447 kg (5,390 lb) traveling 89 km/hr (55.3 mph) and impacting at 20 degrees; and a station wagon ballasted to 1979 kg (4,360 lb), traveling 90 km/hr (56.2 mph) and impacting at 25 degrees. Both tests showed that a CGS can successfully withstand the impact of both a pickup truck and a heavy passenger car, and satisfy the requirements for structural adequacy, occupant risk and vehicle trajectory in "NCHRP Report 230" under these impact conditions. Maintenance costs for the CGS should be less than those for the metal mesh glare screen. Language: en |
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Keywords |
Accident prevention; Highway accidents; Trucks; Construction; Maintenance; Glare; Risks; Strength of materials; Passenger cars; Safety devices; Structural design; Concrete testing; Slip forming |