Best Practices for Road Weather Management Version 2.0
I-75 Fog Detection/Warning System
This document describes a fog-prone area on I-75 in Tennessee near the Hiwassee River, discusses multi-vehicle crashes that have occurred in the area, as well as planning and design of a fog detection and warning system that reduces speed limits based on visibility distance.
FHWA, Tennessee Division. For an electronic copy of this resource, please direct your request to WeatherFeedback@dot.gov.
Motorist warning system
Environmental Sensor Station (ESS)
Dynamic Message Sign (DMS)
Highway Advisory Radio (HAR)
Variable Speed Limit (VSL)
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