Proposed features/through service

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Through service
Status: Proposed (under way)
Proposed by: miklcct
Applies to: Relation
Definition: A public transport service which routing changes between lines
Rendered as: N/A
Drafted on: 2016-09-14


This proposes a kind of relation to associate different public transport services to become a through service, i.e. the vehicles run through the services sequentially, allowing passengers staying on board.


In the approved Proposed_features/Public_Transport schema, there is no provision for through service, i.e. a service which route changes between lines, where its reference number changes at the same time. This is very common in railways in Japan, where trains frequently change between lines, even lines with different operators.


Normal through service

  • A scheduled bus service first runs a part of route K58, then reforms to route K53 at an interchange for the remainder of the trip.
  • A scheduled train service from Zhaoqing to Kowloon, due to operational reason, always uses the reference number Z806 for the segment from Zhaoqing to Guangzhou East, and the reference number Z803 from Guangzhou East to Kowloon.

Circular through service

  • Light Rail routes 614P/615P (Tuen Mun Ferry Pier ↔ Siu Hong), where both termini are the same, form a circular route by means of through service. LRVs on route 614P change to route 615P at either terminus, vice versa.
  • Bus S56 (Tung Chung Station → Tung Chung North → Airport → Tung Chung Station), itself a circular route, forms a through service with itself at its terminus, i.e. passengers may remain on board waiting the bus passing the terminus without leaving the vehicle or re-pay the bus fare, enabling passengers travelling between any two points on the route (e.g. from Airport to Tung Chung North)


Key Value Meaning
type=* route indicates this is a route relation compulsory
route=* bus/train/light_rail/... indicates the mode of transport of the route compulsory
ref=* the combined reference number of the through service if the through service has a reference number, composed by its parts, identified on its marketing materials recommended if available
from=* Station name The origin station of the through service recommended
to=* Station name The destination station of the through service recommended
roundtrip=* yes/no If yes, this indicates there exists a through service between the last segment and the first segment, creating a through service where the passengers can remain on board indefinitely compulsory if yes


Role Member Count Meaning
none Relation type=route 1 or more The segments composing the through service, in the order where the vehicle travels through. The route=* of the members have to be the same as the parent relation, the ending way in a member relation has to be connected to the starting way in the next member relation, and the last stop_position/platform in a member relation may be the same to the first stop_position/platform in the next member relation.

If roundtrip=yes, the above also applies between the last and the first relation members.


None. Only affects public transport routing.

External discussions

Discussion on mailing list about multiple reference numbers


Please comment on the discussion page.