Emergency crews race to serious crash on Bendall and Argyle roads in South West

Emergency crews including the RAC rescue helicopter have rushed to a serious crash in the South West after a car reportedly hit a steel barrier.

The South Western Highway between Bendall and Argyle roads in Argyle, about 10 kilometres north of country town Donnybrook, has been closed, with emergency crews on the scene.

A single car with a solo occupant is understood to be involved. The driver is believed to have non-life threatening injuries.

Police say the crash happened just before 5am.

There are reports of heavy traffic in the area and motorists are urged to use an alternative route.