Teabelly, you are the ABD man and ICMFP.
Seriously, the 85th centile is probably as good a starting point as any to determine a limit. However, the 85% may include many people with poor observation and, where work is in progress, there may be hazards even the most observant will not anticipate. The latter is particularly relevant where the idea that "you never see anybody working in roadworks" is given currency by the media etc.
Last edited by: Bromptonaut on Sat 13 Mar 10 at 21:39
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