Ottawa police have reported 45 collisions since 6 a.m. Friday morning, as the city's prolonged deep freeze has made for slippery road conditions.

Police said roads in Ottawa are icy and slippery and warn drivers to adjust their driving based on those treacherous road conditions.

The Ontario Provincial Police said they have also had to deal with multiple collisions because of the poor driving conditions, and are urging motorists to slow down when travelling on the highways.

The southbound lanes of Highway 416 at Fallowfield Road were closed this morning because of black ice, with one lane reopening just before noon.