Perth traffic: Kwinana Freeway southbound reduced to one lane following car crash

Kwinana Freeway southbound has been reduced to a single lane following a crash after Karnup Road early Thursday afternoon.

Police and road authorities responded to the scene at 12.30pm on Thursday.

Traffic remains heavy on approach.

The lane closure follows a spate of crashes across Perth on Thursday, one of which left a teenage motorcyclist in critical condition.

More to come.