Police are appealing for witnesses to assist them after they chased a car on the Princes Freeway from Morwell to Berwick on Saturday.

Police received a number of calls about an erratic driver in a light blue Toyota Carolla on the Princes Freeway in Morwell around 3pm.

Police attempted to pull over the driver of the vehicle in Trafalgar, but the driver refused to stop and the chase was called off.

A short time later police again attempted to intercept the vehicle on the freeway in Longwarry, where they chased the vehicle to Berwick, before the pursuit was terminated.

Investigators are appealing for any witnesses or anyone who may have dash cam footage of the 1999 Carolla driving dangerously.

A photo of a similar car has been released.