A man has been taken to Watford General Hospital with chest injuries following a crash in Eastbury Road.
Emergency services were called at 10.45am after a member of the public reported seeing the crash between two cars near the Mercedes garage.
The cars involved were white Skoda Fabia and silver BMW 3 series Coupe
One man suffered injuries that are not thought to be life threatening, and has been taken to Watford General.
The other driver was treated at the the scene for minor injuries.