A tractor-trailer fire created a massive traffic jam on Canada's busiest highway Tuesday morning.
For about 30 minutes, Ontario Provincial Police were forced to close Highway 401 in both directions in Mississauga as firefighters battled the blaze, which blanketed the highway in thick smoke.
Shortly after firefighters extinguished the blaze, police reopened the highway in both directions, but traffic was already backed up for several kilometres.
No injuries were reported in the fire.
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