Jeremy Parker wrote:
"Dave Arquati" wrote in message

[snip]

There is software available to companies involved in transport

planning

which can plot "isochrones" (contours of time) of public transport
journey time to a specific point in London.

Unfortunately I can't immediately see any available on the

internet.

When I joined my last company in 1988 the personnel dept had a
printed map for London's public transport, mostly oriented to trains
coming in from outer suburbia, as I recall. The map was ancient
then, disintegrating, and held together with sellotape. I don't
remember who published it. As a child, I remember seeing pre WW II
atlases, old then, with maps of Britain, coloured like contour maps,
showing time to reach London by train.

I think the newer versions of Autoroute do isochrones for cars, and,
of
course, bikes.

There's something funny, though, about the numbers Autoroute produces
if you send it out on a bike at 10 mph.

Every now and again I see "accessibility maps" put out by London's
planning or transport people. I think they credit it to a program
they have called PTAL, or some such. I wonder if you could demand a
copy of the program under the Freedom of Information Act.

PTAL is a scoring system from 1 (or perhaps zero?) to 6, with 6 being
the highest level of public transport accessibility. The southern
portion of the King's Cross development (developers: Argent) has a PTAL
score of 6, as by the time it is built, it will probably have the best
public transport accessibility in the entire country.

--
Dave Arquati
Imperial College, SW7
www.alwaystouchout.com - Transport projects in London