All northbound lanes and two southbound lanes of the M1 Pacific Motorway are closed at Berowra due to a truck crash near the Berowra Exit.
Motorists are advised to avoid the area. Northbound motorists are being diverted off the motorway at Berowra via the Pacific Highway.
Traffic is very heavy in both directions and motorists already on the motorway are advised to expect significant delays.
Emergency services and traffic crews are on scene working to free the occupant of the truck who is trapped.
Meanwhile all northbound lanes of the M1 Pacific Motorway have reopened about one kilometre south of the Tuggerah exit in Tuggerah following a multi vehicle crash.
Traffic remains heavy and motorists are advised to continue to allow extra travel time as traffic returns to normal.
For the latest traffic information visit livetraffic.com or call 132 701.