If you're heading for the M5 this afternoon, be prepared for a fair bit of traffic on your trip.
There's been a crash at Casula involving a car and a truck which is causing significant delays.
Two of three westbound lanes of the M5 were closed, correct as of 5.12pm.
These lanes are closed just past the Hume Highway.
As of 5.38pm, all westbound lanes have re-opened, however there are extensive delays still in place with heavy traffic.
Westbound traffic is banked up to roughly 10km, so motorists are advised to leave plenty of travel time.
Emergency services and traffic crews are currently at the site.