A 15-year-old girl suffered critical injuries in an accident involving a lorry on the A259 seafront road in Shoreham on Friday (21 July).
Police are appealing for witnesses to the accident which was on a road much used by drivers to and from Brighton and Hove.
Sussex Police said: “A Spanish language student was critically injured when she was involved in a collision with a truck in Shoreham on Friday.
“Police were called to the incident between Saltings roundabout and Shoreham High Street at 1.20pm and the road remained closed for nearly four hours.
“The pedestrian, a 15-year-old language student from Spain, was taken by air ambulance to St George’s Hospital in London with serious multiple injuries.
“She remained in a critical condition on Monday morning.
“Her family has been informed and has travelled to the UK to see her.
“The driver of the black Mercedes HGV, a 55-year-old man from Portsmouth, was uninjured in the incident.”
Sergeant Anthony Crisp, said: “Police would like to thank local residents and drivers for their patience during this road closure.
“We would still like to speak to any members of the public who may have any information in relation to the crash.”
Anyone who saw what happened is asked to email email@example.com quoting Operation Grimsby.