M1 motorway: Morning peak chaos with major delays on Hawkesbury Bridge after multi-vehicle crash

Traffic is in chaos on a major motorway north of Sydney, after a multi-vehicle crash has traffic banked back for kilometres.

Reports are filtering through of a traffic snarl snaking back over six kilometres, southbound, after the crash on the Hawkesbury River Bridge M1 motorway, which is a major funnel for commuters into Sydney.

The morning peak is now disrupted for thousands of drivers as emergency services seek to clear the crash scene with traffic control NSW advising people to expect long delays.