The Newell Highway is closed in both directions north of Tomingley, near Dubbo, due to a truck fire.
Northbound motorists should divert off the highway at Tomingley, take Tomingley Road to Narromine, then the Mitchell Highway to Dubbo.
Southbound motorists are being diverted at Dubbo onto the Mitchell Highway, then onto Tomingley Road at Narromine to rejoin the Newell Highway in Tomingley.
This detour will add around 20 minutes to the trip.
Emergency services and traffic crews are on site.
For the latest traffic information, visit www.livetraffic.com or call 132 701.