Emergency services are dealing with a “serious accident” on the A19.
Highways England said that the incident happened on the northbound carriageway, just before the A684 turn off for Northallerton.
Police are on the scene, and the Great North Air Ambulance Service is said to be on route – live updates on this incident here.
Highways England tweeted: “A19 northbound just prior to the A684 Northallerton turn off.
“Police are on scene with a serious accident. Air ambulance are on route. The police are on scene.
“We are on route to put out closures, will pass more when known.”
An additional tweet from Teesside Traffic states: “All lanes stopped, queueing traffic and stationary traffic due to serious accident on A19 northbound between A61 and A684.
“The road has been closed from 12.30pm, air ambulance is on scene and southbound may have to close for air ambulance.”
One person on Twitter said: “Serious looking crash on the A19 about 20 miles south of Middlesbrough for any Hull City fans heading that way. We got though just in time but could cause delays.”
Another said there was a “hefty delay”.
Like the Teesside Live Facebook page to get the latest news in your feed and join our group dedicated to court and crime coverage . You can also follow us on Twitter and Instagram .