TRL were commissioned by Transport for London (TfL) to test a wide variety of innovative cycle signals and layouts, which involved undertaking a range of trials with cyclists and other road users. Four sub-trials were conducted to investigate the reactions of road users to Low Level Cycle Signals (LLCS) at a specially constructed typical ‘urban’ four-arm junction built at TRL’s test track. In the first of the four trials the LLCS were positioned on the same pole as the standard traffic signals and changed at the same time as the main signals, i.e. as ‘repeaters’. The trial consisted of a ‘control’ and ‘treatment’ experiment, with the LLCS covered and uncovered to understand the relative effect of the signals on behaviour. Trials were conducted over ten days with a total of 248 participants for six different road user groups (cyclists, car drivers, motorcyclists, HGV drivers, pedestrians and partially sighted pedestrians). The evidence from this trial supported the progression to on-street trialling of LLCS as repeaters on the same poles as the main traffic signals. The evidence suggested that the system would be quickly understood by nearly all road users, would not adversely affect safety and could offer a benefit to cyclists as a convenient source of information. The only caveat was that a small number of pedestrians misinterpreted the meaning of the signals to be for cyclists crossing the road.

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