[Tagging] Public transport routes with multiple reference numbers

[Michael Tsang]

Dear all,

How should I fill in the ref=* tag for public transport routes with multiple 
reference numbers, in each of the following cases?

1. There is a service identified by three different numbers, while in fact the 
three numbers belong to the same service with completely no differences. This 
is the case with minibus routes 52A/54A/56A in New Territories, where two 
operators jointly dispatch minibuses onto these routes, sometimes with number 
52A, sometimes with 54A, and sometimes with 56A. However, they are identical 
services.

Is using semicolon in the ref=* tag a good idea?

2. There is a service identified by two different numbers, where the two numbers 
are always used simultaneously. This is the case with Shenzhen bus routes 
M215-M218, where both numbers are always displayed side-by-side in bus stops 
and on the number plates of the buses. They are almost never used 
individually.

3. There is a service, due to operational reasons, identified by two different 
numbers. However, the two different numbers are used in different segment of the 
service, but in fact, they belongs to the same service (i.e. passengers can 
get a ticket and board the vehicle on the segment with the first number, and 
alight at the end of the segment with the second number without intermediate 
alighting or additional payment). This is the case with train route Z806/Z803 
from Zhaoqing to Kowloon, where the number Z806 is used on the segment from 
Zhaoqing to Guangzhou, and Z803 is used on the segment from Guangzhou to 
Kowloon (i.e. it can be treated as a through service).

Regards,
Michael
-- 
Sent from KMail