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Especially in 20 mph zones, SHOULD the same speed limits apply to cyclists as apply to everyone else?
Originally posted by Wild_Rover
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How would that work when cyclists usually have no means of measuring their instantaneous speed?
I think you could possibly have guidance or maybe bye-laws based on painting speed measurement lines on the road surface, but making it an offence of the same seriousness as speeding in a car would be difficult (not that such speeding is properly enforced, anyway).
A cycle travelling at 20mph would cover around 45m in 5 seconds. Therefore lines painted on the road at 45m intervals could be used to roughly estimate speed by counting off 5 seconds from one to the next.
Alternatively, existing regularly-spaced road features such as lane markings or street lights could be used for the purpose by simply posting the relevant time interval on a sign. e.g. if streetlamps are 90m apart, then a cyclist would be travelling at more than 20mph if they covered the distance between them in less than 10 seconds.