All southbound lanes of Highway 400 at Hwy. 9 have reopened after a tractor-trailer rollover, the OPP says.
The rig landed on its side around 11 a.m. Friday, spilling its load of iron filings.
The driver was treated in hospital for minor injuries.
OPP Sgt. Dave Woodford said police would like to talk to the driver of a black Cadillac Escalade, which might have been involved in the crash.