The eastbound A272 has re-opened between Billingshurst and Coneyhurst after an accident near the railway crossing, according to travel reports.
A fire service spokesman said emergency services recieved a call at 8.30am this morning to reports of a car off the road, but no one was in the vehicle.
Fire crews did not responded but handed the incident over to police, the spokesman added.
Travel reports showed the A272 West Chiltington Lane was blocked between Wooddale Lane and West Chiltington Lane due to an accident at the railway crossing.
Motorists reported the car was off the road, but did not fall off the railway bridge.
The stretch is said to be extremely icy and dangerous to drive.