Report Result

Back to Search

Evaluation of the Minnesota Noise Wall and Rubrail System

REPORT NUMBER

TRP-03-396-19

AUTHORS

Jennifer Rasmussen (Schmidt), Nathan Asselin, Ronald Faller, Wyatt Fallet, James Holloway, Karla Lechtenberg

PUBLICATION DATE

2019-01-31

ABSTRACT

The Minnesota Department of Transportation had previously successfully evaluated a noise wall and rubrail system under the NCHRP Report No. 350 safety performance criteria. The rubrail in this system was re-sized, and the system was evaluated with the latest crash testing standard, the American Association of State Highway and Transportation Officials (AASHTO) Manual for Assessing Safety Hardware (MASH 2016). The noise wall and timber rubrail system consisted of an 89-ft (27.1-m) long timber rubrail in front of twelve 18-ft (5.5-m) tall concrete posts with a wooden noise wall. During test no. MNNW-1, with the noise wall installed on the back side of the posts, the 2270P pickup truck impacted the barrier at a 24.7-degree angle at a speed of 63.0 mph (101.4 km/h). The vehicle was captured and redirected by the system and satisfied the safety performance criteria for MASH 2016 test designation no. 3-11. In test no. MNNW-2, with the noise wall installed on the back side of the posts, the 1100C small car impacted the barrier at a 25.4-degree angle with a speed of 63.1 mph (101.5 km/h). The vehicle was captured and redirected by the system and satisfied the safety performance criteria for MASH 2016 test designation no. 3-10. During test no. MNNW-3, with the noise wall installed on the front side of the posts, the 2270P pickup truck impacted the barrier at a 25.9 degree angle with a speed of 61.2 mph (98.5 km/h). The vehicle was captured and redirected by the system and satisfied the safety performance criteria for MASH 2016 test designation no. 3-11.

KEYWORDS

Highway Safety, Crash Test, Roadside Appurtenances, Compliance Test, MASH 2016, Test Level 3, TL-3, Noise Wall, Timber Rubrail, Timber Barrier, and Concrete Posts

Other files to download