Motorists annoyed at the 67 speed bumps recently installed in Muswell Hill, UK have begun a "Honk on a Hump" campaign to protest their use. A group calling itself the Motorists Defence Union has dropped leaflets on nearby households.

The speed bumps "are illegal road obstructions causing damage to vehicles and back injuries to elderly drivers," the leaflet said. "Every time you drive over one of these road obstructions, sound your horn to tell the residents your anger at the unfairness and danger of these humps until they complain to Haringey [town council] about the noise disturbance."