Four crashes had been reported -- with no injuries -- by 9 a.m., as troopers responded to slide-offs.
The busiest section of roadway for the troopers had been Interstate-70 in Clay, Putnam and Vigo counties.
In Vigo County near the 1-mile marker, troopers responded to a jackknifed tractor-trailer in the westbound lanes.
The crash caused the westbound lanes to be closed for approximately one hour. Westbound I-70 traffic was diverted to United States 41 northbound at exit 7, and then to U.S. 40 west in Terre Haute.
No injuries were reported from the accident.
By noon, all lanes of I-70 had been reopened.
ISP officials wished to remind motorists to slow down, allow extra time for necessary travel and drive according to roadway conditions.
For traffic and roadway conditions, call 1-800-261-7623 or log on to www.trafficwise.in.gov.
The Putnamville Post is composed of Parke, Putnam, Clay, Vigo, Vermillion and Sullivan counties.