A multi-vehicle crash on Gladesville Bridge is causing delays on Victoria Road in Drummoyne, in Sydney's inner west. Police shut two of the three westbound lanes and have since reopened them, but it has caused a delay of up to three kilometres.

One city-bound lane also remains closed, and there are queues stretching for one kilometre.

Live Traffic NSW advises motorists to allow extra travel time, and says buses in the area are delayed by up to 50 minutes.

The accident appears to have involved a motorbike and a car. The Crash Investigation Unit, Roads and Maritime Services and Emergency services are on the scene.

For updates check Live Traffic NSW's Twitter feed.