A spokesperson for West Sussex Rescue & Service said: “At 7.23pm we responded to a road traffic collision at the Rusper Road roundabout at Horsham.
“Joint Fire Control mobilised two fire engines from Horsham and Billingshurst to the scene, as well as a heavy Rescue tender from Crawley.
“Crews assisted colleagues from Sussex Police and South East Coast Ambulance Service in making the scene safe.
“The road is currently closed and residents are advised to avoid the area.”