Volume I: Evaluation of Existing Roadside Safety Hardware Using Updated Criteria—Technical Report (2010) / Chapter Skim
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Pages 173-184
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From page 173... ...
173 VI. SUMMARY AND CONCLUSIONS PHASE I Since its publication in 1993, NCHRP Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features" established guidance for evaluating the safety performance of roadside features, such as longitudinal barriers, terminals, crash cushions, and breakaway structures.
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174 assessment ratings assigned to the hardware assessed. The researchers do note that the dramatic increase in impact severity of the pickup truck redirection tests and other changes in the test matrices for terminals and crash cushions will likely necessitate the modification of some of these systems.
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175 barriers, breakaway sign supports, and precast and permanent concrete barriers. Proprietary devices were not considered.
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176 Test 3-11 Test Vehicle: 2007 Chevrolet Silverado 4-door pickup Test Inertia Weight: 5049 lb Gross Static Weight: 5049 lb Impact Speed: 62.6 mi/h Impact Angle: 25.2 degrees The New Jersey safety shape barrier contained and redirected the 2270P vehicle under TL-3 impact conditions. The vehicle did not penetrate, underride, or override the installation.
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177 G4(1S) W-Beam Median Barrier Test-3-10 Test Vehicle: 2002 Kia Rio Test Inertia Weight: 2418 lb Gross Static Weight: 2584 lb Impact Speed: 61.4 mi/h Impact Angle: 26.0 degrees The G4(1S)
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From page 178... ...
178 median barrier, the addition of the rear W-beam rail element provides additional stiffness and constrains the lateral displacement of the posts. Because the rail cannot readily detach from the posts, the rail is pulled down by the posts and the effective rail height is reduced in the region of impact.
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From page 179... ...
179 The U-channel and perforated square steel tube (PSST) small sign supports both readily activated upon impact by the 2270P vehicle by fracturing at bumper height and at the ground stub interface.
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From page 180... ...
180 G3 Weak Post Box-Beam Guardrail Test Vehicle: 2007 Chevrolet Silverado 4-door pickup Test Inertia Weight: 5004 lb Gross Static Weight: 5004 lb Impact Speed: 63.2 mi/h Impact Angle: 25.4 degrees The G3 Weak Post Box-Beam guardrail contained and redirected the 2270P vehicle. The vehicle did not penetrate, underride or override the weak post guardrail.
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From page 181... ...
181 G9 Thrie Beam Guardrail Test Vehicle: 2007 Chevrolet Silverado 4-door pickup Test Inertia Weight: 5019 lb Gross Static Weight: 5019 lb Impact Speed: 63.3 mi/h Impact Angle: 26.4 degrees The G9 thrie beam guardrail did not perform acceptably when impacted by the 2270P vehicle (2007 Chevrolet Silverado pickup)
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From page 182... ...
182 Table 21. Crash Tests Performed Under NCHRP Project 22-14 That Meet MASH (Passed)
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183 Ref.
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From page 184... ...
184 Table 22. Crash Tests Performed Under NCHRP Project 22-14 That Did Not Meet MASH (Failed)
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