Because people never leave enough time to complete their journeys anywhere, and then expect to cut corners to save time. And I know what the people were saying in that article about there being hundreds of accidents and near misses, but unless there have been 3 serious accidents (meaning killed or serious injury) in the previous 2 years, then the authorities will do diddly squat anyway.

Well that's the case in London.
A 'serious injury' is counted as follows:
Quote:
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Serious injury: An injury for which a person is detained in hospital as an †œin-patientââ‚à ‚¬Ã‚ÂÂ, or any of the following injuries whether or not they are detained in hospital: fractures, concussion, internal injuries, crushings, burns (excluding friction burns), severe cuts and lacerations, severe general shock requiring medical treatment and injuries causing death 30 or more days after the accident.
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As found
here.