At a tunnel in Pennsylvania, an overheight/overwidth warning system improved safety; occasional crashes demonstrate value of system and importance of maintenance.

31 October 2006
Squirrel Hill Tunnel,Pittsburgh,Pennsylvania,United States

Summary Information

This conference presentation provided an overview of several ITS technologies that improve safety for commercial vehicles operating in rural areas.

Overheight/Overwidth Warning Systems

Installation of overheight/overwidth warning systems enhance truck safety; however, driver perception and compliance with height-restriction warning systems should be considered prior to deployment. At the Squirrel Hill tunnel in Pennsylvania, one driver ignored warnings given by the system (January 11, 2001) and another assumed their truck would fit in the tunnel at a time when the system was inactive due to mechanical problems (April 2, 2006). These experiences demonstrated the value of the systems when warnings are heeded, and the importance of maintenance to assure proper performance.

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CVO/Freight and ITS Session (Presentation)

Author: Drakopoulos, Alex (Marquette University)

Design Guidelines for Including ITS in Projects, "Colorado DOT CoTrip, Web site URL Guidelines Web New Format 02-05/Web Solutions Packages/Truck Overturn Speed Advisory System.xls. Last Accessed 2 February 2008

Published By: Presentation at the 12th annual ITS Forum, Wisconsin Chapter of ITS America - Smartways. Milwaukee, Wisconsin.

Source Date: 31 October 2006



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Goal Areas


Typical Deployment Locations

Rural Areas


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Benefit ID: 2008-00519