RCMP are asking motorists to watch for emergency vehicles after a crash just west of MacGregor on the TransCanada Tuesday morning shut down the westbound lanes. (CBC)

RCMP are again warning drivers in southern Manitoba about bad driving conditions after a crash on Highway 9.

Police in Selkirk are on the scene of the two vehicle crash northbound near Little Britain Road.

They said poor visibility and slippery roads are a factor in the collision and they are warning drivers to expect delays, and to slow down and watch out for emergency responders.

Several accidents on the Trans-Canada Highway near MacGregor, Man., brought westbound traffic to a standstill on Tuesday morning.

RCMP tried to re-route traffic after the first accident, a two-vehicle crash that happened at about 10:15 a.m., about three kilometres west of MacGregorIt blocked both westbound lanes of the Trans-Canada.

But as police were trying to re-route traffic, two other accidents occurred in the same area, backing up traffic about three kilometres.

Police blamed slippery roads and blowing snow.

The westbound lanes of the TransCanada reopened at noon.