please empty your brain below

Special instructions:
• Before 9am, no answers please. No huge clues either. Other discussion is fine.
• Between 9am and 12 noon, tell us how many stations you got, but not how.
• After 12 noon, tell us how.

<snip>
Clearly didn't read instructions...
Why not just say what's the maximum number of Overground stations you can visit without going anywhere twice, instead of saying what's the longest journey you can make, then contradicting yourself - or is this deliberate misdirection?
Seven Sisters - South Tottenham is good enough for TfL's Out of Station Interchange list, so why don't they have it on the map?
If you use one of the two-out-of station interchanges, does it count as one station or two?
dg writes: See example 2.

And can your route pass through both stations if you don't change there?
dg writes: Yes
3 (Romford, Emerson Park, Upminster).

More seriously, I think I have the final total - though obviously I'm not certain about it.
62.
I get 62.
I think 65
@mazeltov You've gone through Hackney Downs twice.
I 'only' get 53.
62
If I use an out of station interchange interchange that counts as two stations, right? But other stations shown as two blobs (like high/low levels at Willesden) only count as one?
dg writes: Yes.

In that case I get 62 too.
61
62
62 here as well.
I prefer this to yesterday's! 62
I thought I had found a 65 earlier, but I think I counted one or two transfers twice and it was 63 when I checked. I might still have made a mistake, though!
I've got the 62.

@Gordon - most OSIs don't go on the map, or line diagrams (where there's normally more OSIs and detail on them) either. I'd imagine that Walthamstow and Hackney are one there as TfL spend money improving it. Though Forest Gate-Wanstead Park didn't get money spent on it but appears on the tube map
62 (third attempt)
Am I allowed to go through a station twice if the first time I don't stop there (sorry if that counts as a clue...)?

dg writes: Technically yes (but you might end up going through Hackney Downs twice.
62
In that case I will claim 63, but will need to spend the night in Liverpool Street station...
Here's my 62 now it is after noon
Cheshunt -> Hackney Downs (13)
-> Walthamstow Central (3)
Walthamstow Queens Rd -> Gospel Oak (7)
-> Canonbury (5)
-> Clapham Junction (16)
-> Willesden Junction (5)
-> Watford Junction (13)

Cumulative totals:
Cheshunt->Bethnal Green (16)
->Walthamstow C (20)
->Walthamstow QR (21)
->Gospel Oak (27)
->Canonbury (32)
->Clapham J (48)
->Willseden J (53)
->Watford J (66)

Most probably counted wrong!
@ JJ : You've stopped at Hackney Downs twice
Aaaah, oops, right you are!
@1204 Does that involve a non LO service in order to skip some stations you'll be calling at later? If that's allowed I'll raise you by 5 by ending at Kilburn High Road

dg writes: Overground only, sorry.
Same as @Si but in reverse as I started at Watford Junc instead. I also wish yesterday's quiz would have come after today, would have been much easier!
I don’t suppose a train goes from Clapham Junction to Battersea Park or vice versa?

It would have been nice if the answer involved a station not on the map.
@None yes my 63 was using a Greater Anglia service that didn't stop at Hackney downs, but I now see DG's rules prohibit that move, so I'm back to 62 :-(.
Chris' 63 staying overnight at Liverpool Street sounded to me like there's a parliamentary train over the Graham Road Curve. Does such a train exist? (I'm not sure it would be useful for this challenge).

Actually, thinking about parliamentary trains has given me an extra station. Use the Woodgrange Park - Willesden Junction Parliamentary Train and change between GOBLin and NLL at Hampstead Heath, rather than Gospel Oak (which the parliamentary train skips).
That’s not a parliamentary train - it’s part of the actual timetable and is a PIXC buster service. Used to catch it every morning as was the quickest way from crouch hill to West Hampstead.

Great shout though - and arguably does count as you don’t “visit” gospel oak on the way through to Hampstead Heath as you pass on a track separated from the platform.
@si
"Chris' 63 staying overnight at Liverpool Street sounded to me like there's a parliamentary train over the Graham Road Curve."

No, I think what he was doing was getting one of the handful of late night GA services which run non-stop from Seven Sisters to Liverpool Street. This would only add one station (net) though, as although you gain Liverpool Street and the first three stations out of there, you miss the three between Seven Sisters and Hackney Downs.
Fair enough on the technical description of the train (though Parliamentary trains are on the timetable). 63 it is then!
@timbo at 4.33

I got that from Chris' later posts, but before them I was wondering if there was some odd service along that curve - because the Hackney Downs issue and the Overground-only rules negated other possibilities for such a move to be legitimate.

I brought that thinking up for two reasons - the inspiration about the PIXC service I used to eke out a 63rd station, and to find out if there was such a service using that curve.
You couldn't actually do this complete trip today (or yesterday) due to a track fault between Wandsworth Road and Clapham Junction.

Trains are diverted to Battersea Park, which will have seen a large boost in passenger numbers compared to the usual 'parliamentary' service that dg so presciently wrote about yesterday.

dg writes: You're the fifth commenter to tell us this brilliant fact ;)

Oh, and another 'parliamentary' train was the one derailed at Wimbledon - it unusually takes the District line to East Putney, rather than the direct route via Earlsfield. That set of points sees very little use.
I agree that Si at 12:09 has the correct answer - 62 stations between Watford Junction and Cheshunt.

63 is possible via that special train that skips Gospel Oak, but 62 is the 'normal' maximum.
Same direction as MS. Got stuck on 56, but persevered.

It is ~24 miles between the start/finish points and takes just over one hour by 3x train/tube.

How long would the 62 station journey take?
Some of us in TfL argue against every single OSI being shown on the Tube map. There isn't space to include a convenience indicator, so the average casual user may not thank us for, say, having a 10 minute walk alongside the A40 in the rain from Hanger Lane to Park Royal when they expected it to be across the road like at Hammersmith. The Journey Planner should throw the interchange up but is also able to warn you about the walk in a way the map can't. A case could be made for some more including perhaps Seven Sisters-South Tottenham but it still might be a bit disconcerting to be expected to walk some distance between stations in an unfamiliar area.
The 'route':



How long until we can read the post on this 62-station marathon Overground journey..?

Later this week I hope.
@Ken

4hr 6 minutes, leaving Cheshunt at 01 minute past the hour.

(Because of the mismatch between the 30 minute frequency from Cheshunt and the 20 minute frequency to Watford Junction, leaving on the half hour takes 10 minutes longer)
Of course if you travel in the opposite direction leaving Watford Junction at 40 minutes past the hour you can complete the challenge in 3hr 44 minutes (which is faster than what I said earlier).
In order to do this challenge in the stated time you'd have to have a travelcard or similar (annoyingly expensive to include Watford Junction). Oyster would require occasional dashes out and in gates at craftily-chosen points to avoid getting a penalty fare.
@timbo 1115
I didn't spot that, but then I'm not you.
(I'm the one who doesn't know how to do italic type in these comment boxes)










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