A woman was taken to hospital after a crash on the A27 at Arundel yesterday afternoon.
Sussex Police said: “Police are appealing for witnesses and relevant information following a serious collision on the A27 near Arundel.
“Officers were called to the Arundel bypass at about 3pm on Sunday 17 December.
“The collision involving a dark grey Peugeot and a silver Mercedes convertible happened on the eastbound carriageway about 100 yards past the junction with Fitzalan Road.
“A passenger in the Peugeot, a 53-year-old woman, from the Petersfield area, in Hampshire, sustained serious injuries and was taken to hospital, where she remains.
“The driver of the Peugeot, a 62-year-old man, from the Petersfield area, and the driver of the Mercedes, a 58-year-old woman from Fontwell, were also involved in the collision.”
Sergeant Ian Richardson, from the Roads Policing Unit, said: “We are investigating the circumstances of the collision, and want witnesses or anyone with information to come forward.
“In particular, we would like anyone with dashcam footage of the incident, or of the vehicles in the area in the minutes before the collision, to come forward.”
Information can be reported to Sussex Police online or by calling 101, quoting serial 638 of 17/12.