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... 1   This guide describes various technologies available for the prevention and mitigation of vehicle intrusions into highway work zones. The guide was prepared from an NCHRP project to survey and classify available technologies in this domain for ease of decision-making by stakeholders, including transportation agencies and contractors.
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... 2 Guide to Alternative Technologies for Preventing and Mitigating Vehicle Intrusions into Highway Work Zones Functionality Technology Status Positive protection devices 1. Automated equipment with truck-mounted attenuators Research and development 2.

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