Traffic is queued for about 4km after a multi-vehicle crash on the M1 Pacific Motorway at Mount Kuring-gai on Monday afternoon

FILE IMAGE: Emergency services are on the scene of a multi-vehicle crash on the M1 Pacific Motorway at Mount Kuring-gai.
FILE IMAGE: Emergency services are on the scene of a multi-vehicle crash on the M1 Pacific Motorway at Mount Kuring-gai.

Update

ALL northbound lanes of the M1 Pacific Motorway are now open after a multiple vehicle crash at Mount Kuring-gai.

One northbound lane of the motorway was closed approaching the Church Street overpass.

Traffic is still heavy so motorists should continue to allow extra travel time.

Earlier

Motorists travelling north on the M1 Pacific Motorway are experiencing significant delays due to a multiple-vehicle crash at Mount Kuring-gai.

One of three northbound lanes is closed approaching the Church Street overpass.

Traffic is queued for around four kilometres so motorists should allow plenty of extra travel time.

Emergency services and traffic crews are on site.

For the latest traffic information, visit livetraffic.com, download the Live Traffic NSW app, or call 132 701.