Report Result

REPORT NUMBER

AUTHORS

PUBLICATION DATE

ABSTRACT

This report documents two-full scale vehicle crash tests that were conducted to investigate the safety performance of the Hawaii Department of Transportation’s (HDOT’s) 34-in. Tall, Aesthetic Concrete Bridge Rail with Pedestrian Handrail and Sidewalk. The barrier system was 88 ft long and consisted of three 21-ft 11½-in. long concrete parapets anchored to the concrete tarmac. Expansion joints between each adjacent segment consisted of 24½-in. long, No. 8 ASTM A615 Grade 60 steel bars cast into the existing concrete tarmac and inserted into PVC pipes on the upstream side of the expansion joint. The sidewalk was 88 ft long, 6 ft wide, and 6 in. tall. The pedestrian handrail was fabricated using 3-in. x 3-in. x ¼-in. steel square tube supported by 2½-in. x 2½-in. x ¼-in. steel square tube posts mounted on the back side of the bridge rail at a height of 8½ in. above the top surface of the bridge rail. Test nos. HP34S-1 and HP34S-2 were conducted according to American Association of State Highway and Transportation Officials’ Manual for Assessing Safety Hardware 2016 (MASH 2016) criteria using Test Level 3 (TL-3) test designation nos. 3-11 and 3-10, respectively. In test no. HP34S-1, a 2270P quad cab pickup truck impacted the sidewalk at a speed of 65.7 mph and an angle of 25.2 degrees and impacted the barrier at a speed of 63.6 mph and an angle of 23.7 degrees. Although the sidewalk impact speed nominally exceeded the MASH limits, MASH accepts values in excess of the criteria for longitudinal barriers impacted within the length-of-need. In test no. HP34S-2, a 1100C small car impacted the sidewalk at a speed of 62.0 mph and an angle of 25.0 degrees and impacted the barrier at a speed of 60.2 mph and an angle of 22.8 degrees. In both tests, the bridge rail successfully contained and redirected the vehicle. Thus, test nos. HP34S-1 and HP34S-2 successfully met the TL-3 safety performance criteria defined in MASH 2016.

KEYWORDS

Compliance Test, MASH 2016, Aesthetic, Barrier, Parapet, Bridge Rail, Pedestrian, Handrail, Sidewalk, TL-3, Roadside Safety, Safety

REPORT