Motorists needing to travel between Grafton and Glen Innes can use the New England Highway, Bruxner Highway and Summerland Way via Tenterfield and Casino. 

This alternative route adds about 2.5 hours to journeys and is not suitable for B-doubles. 

The highway will remain closed until 6am Wednesday. 

Motorists are advised to allow plenty of extra travel time and plan their trip.