An update on the semi tractor/trailer tipped over on the Trans-Canada Highway near Tompkins.

Maple Creek RCMP have responded to the scene of the incident, and have the eastbound lanes of Highway 1 blocked off.

Motorists can expect delays, as eastbound traffic has been re-routed to the westbound lanes.

The crossover to two-lane traffic is approximately 9km west of Tompkins near the grid to Sidewood.

Motorists are asked to reduce their speed and drive with caution while the RCMP attend to the tractor/trailer whose contents have been described as "strewn over the roadway".

Updates will be given by the newsroom as they arise.