Minnesota Department of Transportation

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Traffic Engineering

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Truck Rollover Warning System (TROWS)

Project Description

The location of this project at the ramp from southbound I-694 to eastbound I-94 was selected due to the excessive number of large truck rollovers that have occurred there.  According to the “Minnesota Motor Vehicle Crash Facts, 2010” and the American Trucking Research Institute’s (ATRI) “Mapping Large Truck Rollover : Identification and Mitigation through Spatial Data Analysis”,  this location has had the second most truck rollovers in the state.
The goal of the project is to give truck drivers advance warning. Through the systems engineering process, it was determined that the warning will be for trucks entering at an unsafe speed and during slippery conditions that may increase the likelihood of a roll over or run off the road crash.
The Truck Rollover Warning System (TROWS) is an enhancement of International Road Dynamics, Inc. (IRD)’s current Truck Rollover Warning System.  The warning system uses both Weigh-in-Motion (WIM) and Road Surface Detection technologies to provide a new solution to the rollover problem. This project will use the IRD iSINCTM technology to incorporate truck rollover and road condition warnings at a single site, which is a new innovation to current rollover warning systems.
Along with the WIM, a two message blank out sign display will also be installed. The blank out sign will display an LED Truck Rollover (W1-13) and a Slippery When Wet (W8-5). A secondary sign will display an advisory speed for trucks approaching an unsafe speed on the ramp.

Project Benefits

  • Improved safety

Project Documents