A woman had to be cut free when her car's airbags were set off after she drove over a raised manhole.
As a result Bedford's High Street was closed for more than an hour on Wednesday afternoon.
Bedfordshire Fire Service said it was called out "after a sound like an explosion was heard" and crews had to remove the roof of the Seat Leon FR.
"If you have a low suspension car it is best to avoid the High Street at the moment," a fire spokesman said.
The fire service said manholes posed a risk to cars because works had removed the surface of the road around the covers.
The woman was removed from the vehicle using a long board for support and taken to Bedford Hospital for treatment for neck pain.