Volume I: Evaluation of Existing Roadside Safety Hardware Using Updated Criteria—Technical Report (2010) / Chapter Skim
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99 V FULL-SCALE CRASH TESTING 32-INCH NEW JERSEY SHAPE BARRIER – SGM11a Test Installation Description This version of the 32-inch permanent New Jersey Shape Barrier was designed to meet performance level two of the American Association of State Highway Officials (AASHTO)
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100 The strength of the railing was computed using yieldline analysis procedures. The strength computations predict the length of the failure mechanism to be 8.1 ft and the total ultimate load capacity to be 74 kips.
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101 box van went over the top of the barrier. The vehicle began to travel parallel with the barrier at 0.433 s, and was traveling at a speed of 56.6 mi/h.
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102 Figure 41. Test Vehicle after MASH test 4-12 on the 32-inch New Jersey Safety Shape Barrier.
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103 Summary of Test Results The 32-inch New Jersey Shape Barrier failed to contain and redirect the SUT vehicle. The SUT rolled 101 degrees before exiting the end of the barrier.
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104 0.000 s 0.246 s 0.489 s 0.735 s General Information Test Agency .........................
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105 Table 10. Performance Evaluation Summary for MASH Test 4-12 on the 32-inch New Jersey Shape Barrier.
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106 Test Number 476460-1-4 (MASH Test 4-11) Test Description 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 Of note, the same barrier installation was used for both 4-12 and 4-11 crash tests since the barrier only sustained cosmetic damage during the 4-12 test.
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107 Figure 43. 32-inch New Jersey Shape Barrier after MASH Test 3-11.
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108 Data from the accelerometer, located at the vehicle center of gravity, were digitized for evaluation of occupant risk. In the longitudinal direction, the occupant impact velocity was 14.1 ft/s (4.3 m/s)
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109 0.000 s 0.231 s 0.462 s 0.693 s General Information Test Agency .........................
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110 Table 11. Performance Evaluation Summary for MASH Test 4-11 on the 32-inch New Jersey Shape Barrier.
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111 W-BEAM GUARDRAIL – G4(2W) Test Installation Description The G4(2W)
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112 Figure 47.
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113 separated from the vehicle. The vehicle began to roll at 1.263 s as the wheel rims on the left side dug into the soil.
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114 tire) , left rear exterior bed, rear bumper and tailgate.
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115 vehicle remained upright during the collision event. However, the 2270P vehicle rolled after penetrating the guardrail.
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116 0.000 s 0.234 s 0.469 s 0.820 s General Information Test Agency .........................
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117 Table 12. Performance Evaluation Summary for MASH Test 3-11 on the G4(2W)
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118 W-BEAM GUARDRAIL – G4(1S) MEDIAN BARRIER Test Installation Description The G4(1S)
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119 Figure 51. Cross Section of the G4(1S)
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120 Test Number 476460-1-10 (MASH Test 3-10) Test Description 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 2002 Kia Rio, traveling at an impact speed of 61.4 mi/h, impacted the G4(1S)
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121 Figure 53.
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122 Data from the accelerometer, located at the vehicle center of gravity, were digitized for evaluation of occupant risk. In the longitudinal direction, the occupant impact velocity was 16.4 ft/s (5.0 m/s)
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123 0.000 s 0.119 s 0.236 s 0.475 s General Information Test Agency .........................
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124 Table 13. Performance Evaluation Summary for MASH Test 3-10 on the G4(1S)
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125 Test Number 476460-1-9 (MASH Test 3-11) Test Description Test Vehicle: 2007 Chevrolet Silverado 4-door pickup Test Inertia Weight: 5029 lb Gross Static Weight: 5029 lb Impact Speed: 64.0 mi/h Impact Angle: 25.1 degrees The installation used in the test with the small car (1100C vehicle)
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126 Figure 56.
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127 Data from the accelerometer, located at the vehicle center of gravity, were digitized for evaluation of occupant risk. In the longitudinal direction, the occupant impact velocity was 17.2 ft/s (5.2 m/s)
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128 0.000 s 0.184 s 0.367 s 0.551 s General Information Test Agency .........................
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129 Table 14. Performance Evaluation Summary for MASH Test 3-11 on the G4(1S)
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130 PENNDOT W-BEAM TRANSITION Test Installation Description The W-beam transition (without drainage inlet) consists of 12.5 ft of two nested 12-gauge W-beam guardrails blocked out from the end of a concrete parapet using a 6-inch-diameter spacer tube followed by 12.5 ft of single W-beam guardrail.
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131 "V-shaped" bars that were cast in the slab and extended from the bottom layer of reinforcement in the slab upwards into the parapet. These bars were located approximately 6 inches on centers from the end of the parapet to a distance of approximately 14 ft from the end.
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132 Figure 59. Details of the Pennsylvania W-Beam Transition.
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133 Test Number 476460-1-3 (MASH TEST 3-21) Test Description Test Vehicle: 2007 Chevrolet Silverado 4-door pickup Test Inertia Weight: 5029 lb Gross Static Weight: 5029 lb Impact Speed: 62.8 mi/h Impact Angle: 25.7 degrees The 2007 Chevrolet Silverado pickup, traveling at an impact speed of 62.8 mi/h, impacted the W-beam transition 8.6 ft upstream from the end of the concrete parapet at an impact angle of 25.7 degrees.
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134 Figure 61. PennDOT W-Beam Transition after MASH Test 3-21.
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135 Data from the accelerometer, located at the vehicle center of gravity, were digitized for evaluation of occupant risk. In the longitudinal direction, the occupant impact velocity was 16.4 ft/s (5.0 m/s)
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136 0.000 s 0.139 s 0.278 s 0.416 s General Information Test Agency .........................
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137 Table 15. Performance Evaluation Summary for MASH Test 3-21 on the PennDOT W-Beam Transition.
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138 SMALL SIGN SUPPORTS Test Installation Description Steel U-Channel Support A 4 lb/ft steel U-channel support manufactured by NuCor Steel Marion was erected in standard soil. The overall length of the sign support was 9 ft-8¾ inches.
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139 Figure 65. U-Channel Sign Support prior to Testing.
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140 at a height of 25 inches above ground, is 3940 lb, 5500 lb, and 6540 lb, respectively (90 percent of static load for the initial standard installation)
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141 Test Number 476460-1-2 (Mash Test 3-62) Test Description Test Vehicle: 2003 Dodge Ram 1500 quad-cab pickup Test Inertia Weight: 4958 lb Gross Static Weight: 4958 lb Impact Speed: 63.3 mi/h Impact Angle: 0 degrees The 2003 Dodge Ram 1500 quad-cab pickup, traveling at an impact speed of 63.3 mi/h, impacted the U-channel sign support at 0 degrees with the left quarter-point of the pickup aligned with the centerline of the support.
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142 Figure 68. U-Channel Installation after MASH Test 3-62.
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143 Damage to the PSST Sign Support is shown in Figure 69. The stub of the PSST sign support was displaced toward the field side 3 inches at ground level.
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144 Figure 69. PSST Sign Support after MASH Test 3-62.
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145 Figure 70. Vehicle after MASH Test 3-62 with Small Sign Supports.
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146 0.000 s 0.062 s 0.124 s 0.187 s General Information Test Agency .........................
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147 0.187 s 0.254 s 0.313 s 0.376 s General Information Test Agency .........................
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148 Summary of Test Results Both the U-channel and PSST small sign supports readily activated upon impact by the 2270P vehicle by fracturing at bumper height and at the ground stub interface. The detached sign supports rotated around the front of the vehicle, and the sign panels struck near or at the windshield and roof area and traveled with the vehicle.
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149 Table 16. Performance Evaluation Summary for MASH Test 3-62 on the 4 lb/ft U-Channel Small Sign Support.
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150 Table 17. Performance Evaluation Summary for MASH Test 3-62 on the PSST Small Sign Support.
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151 G3 WEAK POST BOX-BEAM GUARDRAIL Test Installation The G3 Weak Post Box-Beam guardrail system is a 27-inch tall, weak steel post, boxbeam barrier. The barrier is constructed using tubular steel (TS6 inch x 6 inch x 3/16 inch)
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152 Figure 73. G3 Weak Post Box-Beam Guardrail prior to Testing.
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153 The 2007 Chevrolet Silverado pickup, traveling at an impact speed of 63.2 mi/h, impacted the G3 Weak Post Box-Beam guardrail 12 ft-1 inch upstream of the splice at the onethird point (35 inches downstream of post 12) at an impact angle of 25.4 degrees.
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154 Figure 74. G3 Weak Post Box-Beam Guardrail after MASH Test 3-11.
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155 Figure 75. Test vehicle after MASH test 3-11 on the G3 weak post box-beam guardrail.
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156 0.000 s 0.183 s 0.364 s 0.638 s General Information Test Agency .........................
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157 Table 18. Performance Evaluation Summary for MASH Test 3-11 on the G2 Weak Post Box-Beam Guardrail.
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158 MODIFIED G2 WEAK POST W-BEAM GUARDRAIL Test Installation Description The Modified G2 Weak Post W-Beam guardrail is a 32-inch tall, weak steel post, W-beam barrier with rail splices mid-span between the posts. This barrier was successfully crash tested in accordance with NCHRP Report 350 and is the same barrier referred to in TTI Project Number RF473750-3 as the PennDOT Type 2 guiderail that was modified for that study.(14,15)
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159 Figure 77. Cross-Section of the Modified G2 Weak Post W-Beam Guardrail.
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160 Test Number 476460-1-7 (MASH Test 3-11) Test Description Test Vehicle: 2007 Chevrolet Silverado 4-door pickup Test Inertia Weight: 5004 lb Gross Static Weight: 5004 lb Impact Speed: 62.4 mi/h Impact Angle: 24.6 degrees The 2007 Chevrolet Silverado pickup, traveling at an impact speed of 62.4 mi/h, impacted the Modified G2 Weak Post W-Beam guardrail 21 ft-4 inches upstream of the splice at the one-third point (31 inches upstream of post 12)
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161 Figure 79. G2 Weak Post W-Beam Guardrail after MASH Test 3-11.
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162 at the left front corner at bumper height. Maximum occupant compartment deformation was 0.25 inches in the lateral measurement across the cab in the driver's side hip area.
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163 0.000 s 0.183 s 0.364 s 0.638 s General Information Test Agency .......................
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164 Table 19. Performance Evaluation Summary for MASH Test 3-11 on the G2 Weak Post W-Beam Guardrail.
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165 G9 THRIE BEAM GUARDRAIL Test Installation Desciption The G9 thrie beam guardrail system consisted of a 12 gauge thrie beam rail mounted on 6 ft-6 inch long W6x8.5 steel posts spaced 6 ft-3 inches apart with 6 inch x 8 inch x 22-inch long routed wood blockouts. The blockout was attached to the post with 5/8-inch diameter bolts without washers.
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166 Figure 83. G9 Thrie Beam Guardrail prior to Testing.
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167 and fractured. The right front and right rear wheel began to rise, at 0.132 s and 0.245 s, respectively.
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168 Figure 84. G9 Thrie Beam Guardrail after MASH Test 3-11.
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169 Data from the accelerometer, located at the vehicle center of gravity, were digitized for evaluation of occupant risk and were computed as follows. In the longitudinal direction, the occupant impact velocity was 17.1 ft/s (5.2 m/s)
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170 0.000 s 0.193 s 0.388 s 0.678 s General Information Test Agency .........................
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171 Table 20. Performance Evaluation Summary for MASH Test 3-11 on the G9 Thrie Beam Guardrail.
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