Emergency services were called after a road traffic collision outside a school this morning.
Police attended Swing Gate Lane in Berkhamsted at 8.30am after the incident involving a red Volvo and a white BMW.
A spokesman for Herts Police said officers set up a partial road closure as it was causing some disruption to traffic.
An ambulance crew attended and treated a woman in her 40s before she was taken to Watford General Hospital for further care.
A spokesman for the East of England Ambulance Service said the woman’s injuries are not thought to be life-threatening.
It is believed the road is now clear.