Police were forced to close a section of Bruce Rd. 4 between Wingham and Teeswater following a two-vehicle collision on Wednesday.
EMS, firefighters and police responded shortly after 9am after a truck and a van collided south of Teeswater.
Police say at least one person was injured but no further information has been released.
The OPP closed Bruce Rd. 4 from the northern edge of Wingham to the south limits of Teeswater while officers investigated. The road was reopened around 11:30am.
With a drop in temperature early Wednesday morning and the cold northwest wind, there was slush and ice on many roads.