United States Department of Transportation
i
Worker safety during operations with mobile attenuators.
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2013-05-01
[PDF-2.96 MB]
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;NTL-SAFETY AND SECURITY-Highway Safety;
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Abstract:While most transportation agencies are very familiar with truck-mounted attenuators, trailer-mounted
attenuators are increasing in popularity. There is a concern for the level of protection that attenuators
provide for workers when they are mounted on trailers compared to trucks. This research evaluated and
compared the level of protection provided to workers by truck-mounted and trailer-mounted attenuators. No
crash testing was conducted; instead, the researchers used existing crash test report data for the comparison.
The researchers found that the use of heavier support vehicles for these mobile attenuators provided better
protection for workers and recommend that TxDOT maintains the current policy of requiring 20,000 lb
support vehicles, regardless of attenuator type. In addition, the researchers found that the concern of trailermounted
attenuators swinging around may not be justified, given that post-impact trajectories of the
impacting vehicles are similar to those reported during truck-mounted attenuator impact testing.
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