UPDATE 10.30AM - The RMS advises all lanes at the accident site are now open.
All northbound lanes on the Hume Motorway are closed through Mount Annan due to a serious crash involving two trucks approaching Narellan Road.
Northbound traffic should use Picton Road, Remembrance Drive, Camden Bypass and Narellan Road, where they can then rejoin the Hume Motorway. Emergency services and traffic crews are on site. Motorists are advised to allow plenty of extra travel time.
Image Credit: RMS Live Traffic