Jersey Police want to hear from anyone who has any footage of the crash on the St Clement's main road on Wednesday 27 April.
It involved a red Suzuki and a white van at the junction with Rue de Samares at around 8:30am.
The drivers of both vehicles were taken to hospital for treatment.
One has been released and one remains in a stable condition.
Police officers, ambulance crew, and fire service personnel attended the scene. RNLI staff, who happened to be in the area, were first on the scene and attended to the drivers.
Anyone with information is asked to call the police on 612612 or Crimestoppers anonymously on 0800 555 111.
Other options considered to deter drink-driving
Man completes A-Z marathon challenge in Jersey
"There should be a degree of shame attached to drink-driving"
Footage wanted from scene of serious collision
Busier summer at Jersey's airport and harbour
Record smashed at 2026 Jersey Marathon
Search for speeding cars out west
More than 2,250 runners taking on Jersey Marathon
