Definition of silent policeman in English:

silent policeman

noun

Australian, NZ
  • A traffic-control device in the form of a raised dome set into a road surface at junctions and on corners to control speed and positioning.

    ‘the silent policeman is visible in the middle of Chestnut Street’
    • ‘In an effort to control traffic flow, many towns installed a silent policeman.’
    • ‘They intended the silent policeman to expedite traffic, but it did not.’
    • ‘One of his wheels hit the right hand side of the silent policeman.’
    • ‘The silent policeman is visible in the middle of the street.’
    • ‘There is to be a silent policeman at the intersection of the two highways.’