Press-Gazette Media reports counties have been asked to hold off on salting backbone routes such as state Highways 41, 151, 23 and 26. Interstates will still salted.
Municipalities have been running short on salt with the harsh winter.
The state started using a sand-salt mixture in January, as did many local communities.
State officials are telling drivers to slow down as roads won't be as dry as usual.
County officials say salt prices are high, and they'll be saving remaining supplies for hazardous weather that put drivers at risk.