Proposal: Support multi-car crowding in GTFS-RT

[Loic Fontolliet]

Hello,

I just opened a new proposal to support multi-car crowding in GTFS-RT.

Feel free to review and comment!

Thanks,

Loïc

[Loic Fontolliet]

Hello,

This pull request has been open for several weeks, so per the Official Process I'm calling for a vote.

Vote will be closed on Monday the 7th of September at 23:59:59 UTC.

You can vote via +1 or -1 comment on the GitHub pull request.

Thanks,

Loïc

[Loic Fontolliet]

Hello everyone,

The vote is now closed. Here is the tally.

Yes (+1)

• LIRR (@wafisher)
• AnyTrip (@jxeeno)
• Google (@stotala)
• Ito World (@davidlewis-ito)
• Transit (@juanborre)

No (-1)

• Bliksem Labs B.V. (@skinkie)

Result: 83.3% Yes

We need at least 80% yes for experimental GTFS-RT features per the official process, so this proposal passes.

Note: I will modify the comment describing the `carriage_sequence` field as suggested by @juanborre and @barbeau in this GitHub comment, unless someone wants to change their vote if this change in the comment is made.

Thanks to everyone who contributed to this proposal.

Loïc

[Harsh Verma]

We need to consider and handle the case -

For car ordering or car position, it will be done regardless of the direction of travel -

For many trains and train operators, generally, the train Consists always remains the same, and stay in the same order, with the car adjacent to the locomotive always being termed as Car # 1 and the next car as # 2, then Car # 3 and so on.

So, the reporting of Car # 1 may need to remain the same, particularly with the AMTRAK Capitol Corridor CCJPA. In some other transit systems, it may not be the same.

Even though the train may be going in either direction, the locomotive is many times always on one side and would be either pulling or pushing (behind the cars) the train coaches.

Car 1 is always adjacent to the locomotive, regardless of the direction of travel.

Thanks,

Harsh Verma

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[Harsh Verma]

Hope to see some comments and develop an approach for this...

    https://github.com/google/transit/pull/237#discussion_r496268896 

    https://github.com/google/transit/pull/237 

For multi-car occupancy, “order of Car numbering may not be flipped every time the train direction of travel is changed”.

Carriage Sequence is always going to be 1, 2, 3, 4, 5

The first occurrence of the repeated field will represent the first car or vehicle, given the direction of travel is not always true generally with rail operations and passenger rail industry, specially in the case of AMTRAK Capitol Corridor and this needs to be accounted for, to have an operator view of the same.

There needs to be a special case for this consideration.

 Thanks,

Harsh Verma