The Watford Town Hall underpass was closed off after a car crash last night.
Hertfordshire Constabulary was called to St Albans Road at 9.25pm after a black Mini One hit a crash barrier and ended up blocking the road.
Officers closed the underpass and diverted traffic via the roundabout while the car was recovered.
The road was reopened around 10.30pm. The driver was uninjured in the accident.