Observations were carried out in four towns to determine the extent to which cyclists comply with the lighting regulations and to gather information on lamp reliability and the use of conspicuous clothing. It was found that only about three-quarters of cyclists observed after lighting-up time had a visible light front and rear and 9 per cent had no visible light at all. Interviews were held with cyclists about their cycle lights. Important reasons given for poor performance were damage and poor connections. Over half the respondents indicated that their front lamp was inadequate for revealing obstructions and potholes on unlit roads. The visibilities of a common type of battery lamp, several types of bicycle reflector and a number of conspicuity aids were assessed by observers under controlled conditions resembling those found on roads at night. The cycle lamp was found to be detectable at large distances against high levels of glare providing the batteries were not close to being exhausted. Some commercially available reflectors were visible at adequate distances except in the worst glare conditions. Pedal reflectors and a reflective jacket significantly improved the distance at which a cyclist could be recognised. (A)

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