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It's nonsense. They merely apply the same methods that they would normally apply if they were testing a car. However, with cycling it obviously depends on the individual rider much more strongly than with a car, where you do have some variability of reaction time and driving ability, but where the attributes of the machine are much more important. Some brakeless riders can skid to a stop in very little distance (and the police officer in the video doesn't really skid the way a rider would if faced with an emergency stop situation), others can't.
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The video to me looks pretty rushed, absolutely unnecessary and outright confusing to be rotating a camera for a forensic report let alone letting people walk between the camera and subject (Pathetic). One very long lens at a far distance please.
The poor lighting and anonymity mask only goes to obfuscate the riders actual breaking/riding abilities.
The conditions don't match those on the day (if i read correctly in one of the numerous articles that it was dry). Counter to Alliston's cause, even if it were a wet day, that little lane would probably have a lot more grip than old street due to the heavy use it (old street) gets causing a polished and grimy surface.
No mention of riders height/weight matching Alliston's.
It would be pretty easy to produce a counter video of multiple riders of varied experience to provide better statistics, on that note a single riders attempt no matter how numerous (and considering the bias natural to his employment) does not make for a forensic report no?
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Oliver Schick
mdle
@spindrift
It seems to be generally accepted that no cyclist or driver can stop in 7m at 20mph. The police skid reconstruction is daft. It's on a wet road where the copper rides up to a line and brakes suddenly. Not terribly scientific.