Traffic is moving at a good pace again following a crash involving a gravel truck and several vehicles on Highway 400 south of Mapleview Drive in Barrie.
Police tweeted just before 10:30 Thursday morning that the two left lanes in both directions were closed because the truck rolled over the median wall.
Only minor injuries were reported by provincial police.
The left lanes were closed for repairs and to clean up gravel that spilled onto the highway.
The lanes were reopened shortly after 3 p.m.
There is no word from police about any charges being laid.