Updated at 3:36 p.m. Tuesday: Police say traffic flow has been restored.
Drivers heading south on Highway 2 can expect delays near Highway 604, south of Ponoka.
Ponoka RCMP said they are on the scene of a single-vehicle collision on Highway 2, near Highway 2A, south of the 604 Highway, near Morningside, about 10 kilometres south of Ponoka.
A semi-tractor carrying lumber travelling northbound blew a tire and swerved across the median.
Southbound traffic is being rerouted from Highway 2 onto Highway 604 and back onto Highway 2 while the semi-tractor is removed from the scene.
Motorists should expect delays and are asked to slow down in the area.
Traffic is expected to be rerouted for the next one to two hours, said police shortly before 1 p.m.
There are no injuries reported and Lacombe and Ponoka fire departments are on scene.