Northbound traffic on US 59 South in Nacogdoches will be re-directed to Old Lufkin Road after a crash involving an 18-wheeler near Spradley Street. Motorists should prepare for delays. HazMat is in route and crews continue to work to clear the scene. This is only northbound lanes involved. Southbound is clear and open for travel. Estimated time of clearance could be up to three hours. Updates will follow.