Commuters faced major delays today on one of the region's busiest roads, due to the closure of the A1M northbound.
A full road closure was in place from Junction 63 at Chester-le-Street to Junction 64 at Washington, due to a broken down tanker leaking hydrogen.
Fire crews from Durham and Darlington were on the scene with Durham Police.
Specialist engineers had to carry out analytical risk assessments in order to assist with the 'complex recovery' of the vehicle.
The vehicle contained nine cylinders of gas, one of which had a crack and was leaking. The only way to safely allow it to disperse is to vent.
The tanker couldn't be moved during the venting process, as it would present a serious fire hazard. An exclusion zone was set up by the fire service.
The closure which was expected to be in operation for most of the day is no longer in force.
For more details, visit Highways England North East.