Emergency services closed a road in Taplow after a crash earlier this morning.
A fire engine attended the scene of the crash on Heathfield Road where it appeared a car had mounted the verge.
The road was closed between the junctions with Sheepcote Lane and Bourne End Road, where the accident happened at 8:20am.
Buckinghamshire Fire and Rescue have confirmed one fire engine was sent to the scene from Beaconsfield.
Two men, one woman and one boy were at the scene and out of the cars when they arrived.
A spokesperson for Buckinghamshire Fire and Rescue said: "The firefighters provided immediate emergency care, before passing the three adults and child into the care of South Central Ambulance Service.
"The firefighters used an immediate emergency care pack and an environmental pack.
"The road was closed while they worked at the scene."
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