I-84 Snow Zone Safety Improvements

Oregon Department of Transportation

Summary

Interstate 84 between Pendleton and La Grande, Oregon experiences some of the highest crash rates and severity in Eastern Oregon, making it a high priority for improvement. ODOT recognized a number of issues in the corridor related to hazardous weather. Winter weather in this corridor includes persistent heavy winter fog and blizzards that affect visibility, heavy snow and ice conditions, and high winds that overturn vehicles. Due to these issues, the I-84 Snow Zone project was developed to implement a $15.6M fully automated system that gathers real-time weather with surface condition readings and traffic data that is then used in Oregon DOT’s Active Traffic Management (ATM) system. This system provides traffic advisory messages to the public via 32 variable message signs and access to 21 live cameras accessible online at ODOT’s traveler information website www.TripCheck.com. The project installed 11 new Road Weather Information Systems (RWIS) to capture road surface and atmospheric conditions along this road segment. The project also included the installation of luminaires with LED curve delineation lighting for use during heavy fog events. This project provides features that give motorists advanced warning that result in the reduced frequency of crashes, and provide ODOT personnel real-time information to focus winter maintenance priorities to the correct locations. This project will reduce the estimated $2.7M in annual closure-related costs experienced by delayed movements.

In this case study you will learn:

  1. How Interstate 84 between Pendleton and La Grande in Oregon experiences some of the highest crash rates and severity in Eastern Oregon, due to hazardous winter weather.
  2. How the I-84 Snow Zone project was developed to implement a $15.6M fully automated system that gathers real-time weather with surface condition readings and traffic data that is then used in Oregon DOT’s Active Traffic Management (ATM) system.
  3. This system provides traffic advisory messages to the public via 32 variable message signs and access to 21 live cameras accessible online at ODOT’s traveler information website www.TripCheck.com. The project installed 11 new Road Weather Information Systems (RWIS) to capture road surface and atmospheric conditions along this road segment. The project also included the installation of luminaires with LED curve delineation lighting for use during heavy fog events

Operations Area of Practice

  • Real Time Traveler Information
  • Road Weather Management

Content Type

  • Case Studies & Lessons Learned

Publishing Organization

  • NOCoE

Document Downloads

Issue Date
August 5th, 2022
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