[Tagging] How to tag max width at chicane-type bicycle barriers

John F. Eldredge john at jfeldredge.com
Mon Dec 16 16:05:43 UTC 2013


Richard Mann <richard.mann.westoxford at gmail.com> wrote:
> 0.7m is the width of the path (typical handlebars plus a bit)
> 
> 
> On Sun, Dec 15, 2013 at 4:02 AM, Paul Johnson <baloo at ursamundi.org>
> wrote:
> 
> >
> > On Tue, Dec 3, 2013 at 4:30 AM, Richard Mann <
> > richard.mann.westoxford at gmail.com> wrote:
> >
> >> You could probably calculate it for "standard" bikes by drawing a
> ?0.7m
> >> straight path through the barrier and then calculating the degrees
> of
> >> deviation from straight that requires.
> >
> >
> > I might be missing something here.  0.7m is awful short for a
> standard
> > bike.  Granted, my bike is on the large side for a standard bike (at
> 6'2"
> > (1.88m) in length, it's just 4" short of the maximum length allowed
> on the
> > vast majority of transit systems (6'6" or 1.98m).  City of Portland
> (and
> > likely soon, USDOT) consider a single bicycle parking space as
> minimum
> > 3'x6' (though I'd really prefer it, and wouldn't be surprised, if
> they
> > bumped that up to 7' or 8' just to be consistent with 6'6" being a
> popular
> > maxlength requirement and provide for a little extra clearance given
> > inconsistencies with locking strategies between riders).
> >
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> >
> 
> 
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A handlebar-width opening is too narrow to walk a bicycle through. You also have to have room to turn the bicycle, since a chicane involves a series of turns.

-- 
John F. Eldredge -- john at jfeldredge.com
"Darkness cannot drive out darkness: only light can do that.
Hate cannot drive out hate: only love can do that."
Dr. Martin Luther King, Jr.
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