Police are appealing for witnesses to a crash on the A27 near Chichester on Wednesday (August 10).
At 7.47am a silver Renault Clio was in collision with a black Mitsubishi Lancer on the westbound carriageway about two miles west of the Fishbourne roundabout.
Both vehicles then smashed into the central reservation causing substantial damage to the central barrier and creating long rush hour delays.
Both drivers, an 18-year-old woman from Portsmouth and a 54-year-old woman from Chichester, were slightly injured.
Any witnesses to the collision or anyone who saw either of the vehicles in the time leading up to the incident are asked to call 0845 60 70 999 quoting serial 293 of 10/08.