"Tom Crispin" <[email hidden]> wrote in
message news:[email hidden]...
Quoted message said:Jeremy Parker said:The increase in cycling has been pretty much confined to central
London. I don't think there are any statistics, but it seems
pretty
much an adult phenomenon. Transport for London had a mass purchase
of bike sheds for schools, but don't seem to have done any kind of
survey of the results.
All those Central London Cyclists have come from somewhere, a few
may
live in Central London, a few may bring their bikes in by train,
but
the vast majority have cycled in.
Surveys of school cycle shed are usually a condition for them being
installed.
Quoted message said:The doubling of cycling refers to cycling as measured on London's
trunk roads ("the TLRN network"😉. Trunk roads are less motorway
like
in the middle of London than they are in outer London, but still,
that's not where one thinks of children cycling
TfL have three measures of cyclists.
1. A Thames crossings' count
2. An inner cordon count
3. An outer cordon count
Counts of cyclists are usually an underestimate because they sneak
through the cordon by devious routes, but the bridge/crossing count
is
quite accurate, but as you point out, children are less likely to
cross the bridges.
A full outer cordon count is rarely carried out. It used to be
every
five years but I think it's more frequent now. By comparing a full
outer cordon with an inner cordon or Thames crossing count they can
make a good estimate of any rise or fall in cycling overall without
conducting a full count.
[snip]
The figures in press releases refer to the TLRN, and are plotted on
graphs at four week intervals, so you get thirteen periods a year.
See, for example, TfL's press release of 14 feb this year about the
Tour de France. I have a handout from the 8 Dec 2005 Steering
Committee Meeting of the London Cycle Network confirming this.
TfL also has bike counters along bus priority routes, but for some
reason counts from these are not used for public announcements. Nor
do I know what the results from them are.
After the 7/7 bombings, a Times reporter, Ben Webster, I think,
phoned up the London Cycling Campaign office and got Tom Bogdanowicz.
Tom commutes by bike from his home in Islington to the LCC office in
Southwark. Every day he counts the total number of bikes in all the
bike racks that he passes, and uses that as his proxy for the state
of cycling. Webster asked how much cycling had increased because of
the bombings. Tom knew how much it had increased at his bike racks,
and had the number for the total daily commutes in London Figuring
out that Tom's route was reasonably representative, they multiplied
the two numbers together, and that was the figure that went out to
the nation as London's cycling increase.
One of London's TLRN routes, the A 41, here in Barnet, is now being
examined to see what can be done to help cyclists on it. The
preliminary report ("pre CRIM"😉 included bike counts at fourteen
locations along the road - 12 hour counts, from 7am to 7pm, on Fri
9th July this year (does anyone know what the weather was like
then?). The counts were done using data from the traffic cameras,
though whether manually, or automatically, I don't know.
Unfortunately, the counts do not tell us whether they counted bikes
on the pavement, and if so, what fraction of bikes used the pavement.
Pavement riding is legal at five of the fourteen sites.
Jeremy Parker