THE Mitchell Freeway is reduced to a single lane southbound at the Hay Street overpass, where a truck has smashed into the bridge.
Debris is strewn across the centre lanes following the accident, which happened just after 10am, and a piece of supporting steel can be seen dangling from the bridge.
The truck was believed to be transporting a crane.
PerthNow Digital Edition.
Your local paper, whenever you want it.Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWTraffic is backed up to Whitfords Avenue.
Main Roads is advising motorists to seek an alternative route.