Sydney Morning Herald | 'Up to 10 loud bangs' as lanes closed after M4 smash Sydney Morning Herald Two trucks and three cars have been involved in a smash on the M4 near the Silverwater exit between Auburn and Silverwater. Witnesses said they heard up to 10 loud bangs when the trucks, driving away from Sydney, collided with the cement barrier on the ... Major accident on M4 near Silverwater Road causes traffic delays TRAFFIC: Westbound lanes re-open on M4 after crash earlier this afternoon All lanes closed after M4 smash |