[Talk-transit] catching up
peter.miller at itoworld.com
Sat Jan 10 19:11:01 GMT 2009
On 10 Jan 2009, at 18:06, OJ W wrote:
> Potentially you might need a routing program just to extract the bus
> route info, if they are only specified as a series of points to
> disambiguate between 'obvious' routes that the bus could take?
> Do they have to update the 'hinting points' when roads are constructed
> nearby that could provide a shortcut and the bus route doesn't switch
> over to the new roads?
If the route is unambiguous then no hinting points are needed and one
can use a 'micro-journey-planner'.
If there are two potential routes then the 'way points' are needed.
These are not formally included in NaPTAN and I was at a standards
meeting in December where there was a discussion about how to add it
to NaPTAN. For now, if there are a choice of routes then one doesn't
know which route it takes by using the official schedule data together
with NaPTAN - one either guesses, or avoids showing the route and does
a straight line.
Anyway, that is a problem for 'routes' and is out of scope for the
In the future a new sort of Stop Points may get defined called
'WayPoint' and in some parts of the country I think the data owners
might have included fake bus stops to allow proper routing.
Anyhow, I suggest we get a first pass of NaPTAN import does soon (and
also NPTG) and see how that works and then do another pass and worry
about H&R and other details then.
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