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Data & research

London Road Safety Unit

Glossary

This glossary includes some of the most commonly-used terms in collision and casualty reporting, used throughout the data and research section of this website. Clicking on a term below will reveal an explanation of that term.

Passengers |

Pedestrians

Includes persons riding toy cycles on the footway, persons on a toy scooter, roller skates or skateboard, persons wheeling bicycles, pushing or pulling other vehicles or operating pedestrian-controlled vehicles, those leading or herding animals, occupants of prams or pushchairs, and persons who alight safely from vehicles and are subsequently injured. Also includes persons injured away from the highway by a vehicle that has lost control on the highway, and persons other than a cyclist holding onto the back of a vehicle (e.g. on roller skates).

Personal injury collision |

Powered two-wheeled vehicles |

Riders |

Serious collision |

Serious injury |

Severity |

Severity ratio |

Slight collision |

Slight injury |

Speed limits |

Taxi |

Users of a vehicle |

Vehicles |