Parts of the Barton Highway have closed to drivers following a two-car collision.
Police say two cars collided at the intersection of Randwick Road and the Barton Highway in Lyneham about 11am.
The collision has forced the closure of one lane of the highway between Randwick Road and the Federal Highway.
Police road blocks remain in effect.
Drivers are being warned to avoid the area.
Police have urged motorists to drive to conditions after heavy rain hit Canberra.
The Bureau of Meteorology has forecast up to 70 millimetres to fall in the capital on Wednesday.
