[Talk-transit] Public Transport routing

[Sarah Hoffmann]

On Fri, Sep 04, 2009 at 07:42:58PM +0100, Péter Connell wrote:
> To not use timetables would case various aberrant behaviours like 
> routing Yorkshire-Scotland traffic via Settle (side-note: does NRES 
> still need to be forced to route this way?)
> 
> Speed differentials are such that you'd need scheduling information for 
> any meaningful set up, e.g. here http://osm.org/go/evjiG2F_- where the 
> fastest buses run along the bypass

This problem might be solved by adding approximate travel times to
the routes. While timetables themselves are far to complex to add
to OSM, the time it takes to travel between two stations stays
fairly constant. It might be a nice use for the role in route
relations.

The routing still wouldn't be perfect because change times are
also hard to predict when there is no timetable information.
Nonetheless, it would be immensily helpful to plan travels that
involved multiple modes of transport and multiple operators.
If you ever tried to plan a trip from a small town in France
to a small town in Spain, you will know what I'm talking about.

Sarah


> 
> I think this is something that road routing software has struggled with 
> a while so there may be some helpful potential approaches from there. 
> Though getting the timetables, however difficult, might still be easier!
> 
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