The OPP in Essex County were kept busy with a crash involving four tractor trailers.
Police were called around 10 a.m. on Tuesday to the eastbound lanes of the 401 at the merging lane from Highway 3.
Four tractor trailers and two vehicles were involved.
One truck jackknifed causing the eastbound lanes to be closed for about three hours.
No one was hurt and the highway has since re-opened