On 8 Aug, 15:17, "Paul Scott" wrote:
wrote in message

news:82i7o.66843$Gc2.56680@hurricane...

I looked on the websitehttp://splityourticket.co.uk, but it said that
there were no available options on that route, which I found slightly
surprising.

I could be wrong, but I don't think anyone has successfully produced a
'split fare system' that does a full search. It might just be a lookup of
splits already reported, or known to the authors...

Paul S

There was an exhaustive system discussed on here a few years ago. For
all but the simplest of journeys, it fell over.

I think this is because it relied on live queries of publically
available (web based = v. slow ) front-ends.

Even with a well pruned search tree, the number of hits you'd need fo
any non trivial journey would be huge - and that's true even if you
didn't fall into a tarpit, etc.

In order to do a reasonable job, you'd need direct access to the ojp
databases - each query would still be far more computationally
expensive than a standard ojp query. The people who can do this most
cheaply are the people with the most to lose from such a system
working so don't expect it any time soon.

In the current climate, the application of some basic knowledge to
create rule of thumb heuristics (ie test splitting at major
interchanges / regional boundaries / known price break points ) plus
attempts at some sort of primitive 'crowdsourcing' (yuk) - like the
site cited above - might be the best available approach.

Jon