The A1(M) northbound between junction 48 at Boroughbridge and junction 49 at Dishforth has now reopened, following a serious collision.
The crash, involving two HGVs, happened around 5am this morning. Emergency services have been working at the scene, forcing them to close the road throughout the morning.
There is still around 5 to 6 miles of stationary traffic northbound towards J48, which may take some time to disperse.
The A1(M) northbound between junction 48 at Boroughbridge and junction 49 at Dishforth will remain closed until further notice.
Police are expecting to open lane 3 of the carriageway before midday, to allow trapped traffic to disperse. However, motorists are still advised to avoid the area.
Emergency services are working at the scene.
Those currently travelling northbound are advised to leave at junction 46 and use the diversion on to the A168, to rejoin the A1(M) at junction 49.
Motorists caught in traffic are urged to remain in their vehicles and stay clear of the hard shoulder at all times.
This is for their own safety, and that of the emergency services.
The A1(M) northbound is currently closed between junction 48 (Boroughbridge) and junction 49 (Dishforth) due to a serious collision.
Police were called to reports of a collision involving two HGVs at about 5am.
Emergency services are working at the scene. The road is expected to remain closed for some time.
Drivers are urged to avoid the area and use alternative routes, allowing extra time for their journeys.
One lane is closed due to a broken down vehicle, and there is reduced visibility on the A1(M) Northbound between J48 A168 / A6055 (Boroughbridge) and J49 A168 (Dishforth).
One lane closed due to broken down lorry on A1(M) Northbound between J43 M1 (Hook Moor) and J49 A168 (Dishforth).
A man has been airlifted to hospital after a collision near Dishforth. At 8.40pm on Friday, a car was travelling south on the A168 between Highfields Lane and the Kirby Hill roundabout, when it collided with a car driving in the opposite direction.
The driver of the second car , a 26-year-old man, was airlifted to James Cook Hospital in Middlesbrough with serious injuries where he remains in serious but stable condition.
The driver of the first car, a woman in her 30s, suffered minor injuries.
North Yorkshire Police are appealing fo witnesses.