A large truck with its bed raised crashed into the overpass on Brien Boulevard on Highway 40 near Repentigny, just east of Montreal.
The incident happened just after 11:30 a.m.
The truck appeared to be travelling at a high speed, causing its entire contents, canola seeds, to explode out onto the highway upon impact.
The truck was severely damaged.
The eastward direction of the highway has been closed for an indeterminate amount of time; the westbound lanes have since been reopened.
Officials were asking drivers to avoid the area.