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 third of the four trials the LLCS were positioned on a separate pole to the standard traffic signals, with the LLCS being at the second stop line and the main signals being at the first stop line. The two stop lines were 5 metres apart, resulting in a 5-metre cycle reservoir on each approach to the junction. To understand the relative effects of mounting the main signals and LLCS on separate poles, these trials were compared against the results of earlier trials where the LLCS signals were mounted on the same pole as the main signals. The junction layout was trialled both with and without an early release for cyclists ahead of the vehicle traffic. Trials were conducted over ten days with a total of 300 participants for five different road user groups (cyclists, car drivers, motorcyclists, HGV drivers and pedestrians). The evidence from this trial supported the progression to on-street trialling of LLCS mounted on separate poles to the main signals. The only caveats (in addition to those raised in previous trials) were that as a result of the new layout: a small proportion of cyclists initially stopped before the first stop line; there was an increase in the average Entry Time of cars; and there was also an increase in pedestrians crossing upstream of the crossing.

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