revtothelimit - motorbike forum

The Spin Doctor wrote: Mon Nov 20, 2023 10:34 am Did you know the use of colour for conspicuity aids dates back centuries before the invention of hi-vis clothing?

The Spin Doctor wrote: Wed Nov 22, 2023 1:05 pm I may have mentioned I came across chickens with hi-vis vests on

The Spin Doctor wrote: Mon Nov 20, 2023 10:34 am Find out more about the use of colour in the Science Of Being Seen

The Traffic Research Group, Department of Civil Engineering, Aalborg University, Denmark wrote: Highlights
• A randomised controlled trial with 6793 cyclists shows a reduced accident risk due to a yellow bicycle jacket.
• The test group had 47% fewer multiparty accidents with personal injury.
• The test group had 55% fewer multiparty accidents against motorised vehicles.

Abstract

This study is the first randomised controlled trial (RCT) of the safety effect of high-visibility bicycle clothing. The hypothesis was that the number of cyclist accidents can be reduced by increasing the visibility of the cyclists. The study design was an RCT with 6793 volunteer cyclists – 3402 test cyclists (with a yellow jacket) and 3391 control cyclists (without the jacket). The safety effect of the jacket was analysed by comparing the number of self-reported accidents for the two groups. The accident rate (AR) (accidents per person month) for personal injury accidents (PIAs) for the test group was 47% lower than that of the control group. For accidents involving cyclists and motor vehicles, it was 55% lower. The study was non-blinded, and the number of reported single accidents was significantly lower in the test group than in the control group. This is likely a result of a response bias, since the bicycle jacket was not expected to affect the number of single accidents. To compensate for this bias, a separate analysis was carried out. This analysis reduced the effect of the jacket from 47% to 38%.