Published On: Sat, Dec 17th, 2016

600 Yellow Salt Trucks Continue to Fight Freezing Rain, Ice, Traffic

The Indiana Department of Transportation deployed about 600 yellow salt trucks last night ahead of freezing rain, snow and ice. Yellow trucks continued to battle challenging conditions this morning on interstates, U.S. highways and state routes ahead of rising temperatures.

Low temperatures the past few days caused the pavement to remain well below freezing when rain moved in, causing the rain to freeze on contact. INDOT’s primary weapon was to deploy granular salt just before and during this type of storm as plow blades can only scrape solid ice. Granular salt provides additional traction while the freezing rain dissolves the salt.

Freezing rain and ice are the most dangerous of all winter road conditions because it affects all vehicle sizes and types, including those with four-wheel drive and INDOT’s own salt trucks. In these types of conditions, motorists are strongly encouraged to stay off the roads to allow access for salt trucks and emergency vehicles.

Hamilton, Hendricks and Henry counties in Central Indiana declared orange travel watches, meaning that conditions threaten public safety and only essential travel is recommended. An additional 25 Indiana counties declared yellow travel advisories.

Weather forecasts show the potential for more freezing rain later today into tonight.

Drivers that must venture out in these conditions are urged to make room for INDOT crews. Yellow salt trucks move slower than the posted speed limit for optimal salt spreading, but stopped traffic delays normal route times of every two to three hours.

For more driver tips, please see yesterday’s weather notice at

Drivers can monitor road conditions and traffic alerts across the state at any time. Visit or dial toll-free 800-261-ROAD (7623) for INDOT’s TrafficWise Traveler Information Service. Subscribe to receive text and email alerts about INDOT projects and services at

Find links to INDOT’s regional Facebook and Twitter pages at

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