Police were called just after 4am on Sunday 22nd January 2022, after a silver Vauxhall Corsa left the carriageway on the A326 driving towards Hythe.
Officers attended and the road was closed while the incident was dealt with.
Five people reported injuries, with two of those suffering serious injuries in the collision.
We are keen to speak to anyone who may have witnessed the collision or who may have any information about the incident which assists our enquiries.
Officers particularly would like to hear from anyone who may have broken down or seen a broken down vehicle in the area in the 24 hours prior to the incident.
Anyone with information should call 101, quoting the reference 44220028801.