[Tagging] How to map public transport routes that start and end at the same place and overlap themselves?

Warin 61sundowner at gmail.com
Sun Oct 1 05:06:52 UTC 2017

On 01-Oct-17 01:31 PM, Albert Pundt wrote:
> I'm in Lancaster, PA right now and would like to add the Red Rose 
> Transit <http://www.redrosetransit.com> bus lines to OSM. The network 
> is made up of six "City" lines, serving destinations close to the 
> city, and 11 "County" lines, which are radial routes to nearby towns 
> with stops along the way. (An interactive map of each route can be 
> found here <http://busfinder.redrosetransit.com/Infopoint>.) What I'm 
> confused about is how to properly map the relations of the City routes 
> based on the information in the wiki page 
> <http://wiki.openstreetmap.org/wiki/Public_transport>.
> The page says that each direction of the route should be a separate 
> relation. For the County routes such as Route 10/Lititz 
> <http://www.redrosetransit.com/wp-content/uploads/2017/08/Route-10-all-8-28-17.pdf>, 
> this is easy (though I'm still figuring out how the system's forks 
> work). Since the Queen St Station is the hub of the entire network and 
> serves as the starting point for most of the routes, I'd have a 
> relation for the outbound direction that starts there and ends at 
> Lititz, and another starting and Lititz and ending at Queen St Station.
> However, the City routes aren't so simple. All of them are effectively 
> loops that start and end at the same place, but have significant 
> overlap with itself in the other direction. For most such as Route 
> 1/Park City A SE 
> <http://www.redrosetransit.com/wp-content/uploads/2017/08/Route-1-8-28-17.pdf>, 
> they start at Queen St, go out toward one destination, come back to 
> the other side of town to a different destination, then come back 
> toward Queen St. It effectively makes a very misshapen figure 8. 
> Neither far end of it really serves as a terminal, but rather a 
> prominent station, of which there are several along every route.
> What's the best way to map something like this, where the beginning 
> and end are the same place, making it a one-way loop that overlaps 
> itself? I suppose it all boils down to how to deal with this kind of 
> situation:
> --Albert

Take a look at 

Starts and ends at the same place.

Has loops where it travels on the same road in both directions.

That help?
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