[Tagging] public transport through service

Michael Tsang miklcct at gmail.com
Fri Jun 22 15:35:33 UTC 2018

I have raised this topic two years ago but it seems that there is no community 
consensus here. My problem is "How should we tag a public transport through 
service route?"

In my city there are the following cases:

1. A simple circular route where a passenger can normally stay on board 
through the end / start point unless the vehicle is taken out of service.


2. A route where the vehicle always enter another specific route unless the 
vehicle is taken out of service, and the passenger can stay aboard.

Example (the vehicle on one of the following routes will enter the other 
reaching the end where the passenger can stay on board):

3. A service where the vehicle runs a part of the route, and enters another 

Example: A particular departure on route 751 below will enter route 507 upon 
reaching Choy Yee Bridge in order to cope with passenger demand at that 
particular time, the ref shown will be changed at that en-route stop:

https://www.openstreetmap.org/relation/2926506 (751)
https://www.openstreetmap.org/relation/6481316 (507)

4. A service, due to operational reasons, changes the ref in particular fixed 
points along the route (e.g. when crossing system boundary), but marketed as 
one route on promotional materials (e.g. the train from Foshan to Kowloon, 
which operates as Z806 between Foshan and Guangzhou and Z803 from Guangzhou to 
Kowloon, but it is a single trip with absolutely no alighting allowed at 

Are there any existing practices to deal with these kinds of routes?

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