Tom Anderson wrote:
On Thu, 21 Jun 2007, Boltar wrote:

On 21 Jun, 12:55, "John Rowland"
wrote:
Boltar wrote:

Chesham to Upminster is the longest trip a train could physically
take without reversing or going in circles AFAIK.

As somebody already suggested, Chesham - Aldgate - Tower Hill -
Ealing Common - Uxbridge is much further.

Are there crossovers that allow you to change lines at Mile End?

No.

On Thu, 21 Jun 2007 13:38:36 GMT, Olof Lagerkvist wrote:

Chesham to Upminster is the longest trip a train could physically take
without reversing or going in circles AFAIK.

As somebody already suggested, Chesham - Aldgate - Tower Hill - Ealing
Common - Uxbridge is much further.

If you count such circular routes we can take for example Upminster -
Earl's Court - over to Piccadilly Line tracks - round the Heathrow loop
- back to District tracks - Earl's Court - Aldgate - Chesham. This can
as far as I can see be done without going over the same track twice or
crossing it's own route (if it is done in this direction, it will cross
tracks already used if it is being done in the opposit direction).

If you're allowed to cover the same route twice (just not the same
actual track), you might as well just do Chesham - Chalfont & Latimer
- Aldgate - Heathrow loop - back same way to Chalfont & Latimer -
Amersham.

On 21 Jun, 14:32, Tom Anderson wrote:
Are there crossovers that allow you to change lines at Mile End? If so,
could you, given the right sort of train, do Chesham - Aldgate East - Mile
End - Leytonstone - round the loop - Leytonstone - Aldgate East - Tower
Hill - Ealing Common - Uxbridge? Or does the Aldgate East to Leytonstone
bit make it count as a circular route?

If you allow loops them you might as well do Cockfosters - Heathrow -
Cockfosters which is probably longer than any of the other
permutations.


Thats effectively going in a circle.

Boltar, have you ever seen a circle? If so, would you care to explain the
resemblance of the above route to one?

It starts to the north west of london , loops around central london
and ends up in another part of north west london. Its not a full
circle but its getting there.

B2003

asdf wrote:

On Thu, 21 Jun 2007 13:38:36 GMT, Olof Lagerkvist wrote:

If you count such circular routes we can take for example Upminster -
Earl's Court - over to Piccadilly Line tracks - round the Heathrow loop
- back to District tracks - Earl's Court - Aldgate - Chesham. This can
as far as I can see be done without going over the same track twice or
crossing it's own route (if it is done in this direction, it will cross
tracks already used if it is being done in the opposit direction).


If you're allowed to cover the same route twice (just not the same
actual track), you might as well just do Chesham - Chalfont & Latimer
- Aldgate - Heathrow loop - back same way to Chalfont & Latimer -
Amersham.


Yes of course, I did not think of the possibility to avoid returning to
the Chesham single-track line by terminating in Amersham instead. Good
point.

--
Olof Lagerkvist
ICQ: 724451
Web: http://here.is/olof