Mismatch between Service Alert Feed and Static Feeds

[Meira Zimble]

Hi, 

We are seeing a mismatch in agency_key between static feeds and Service alert feeds for MTA services. For example for MTA subway, in the Static feed the agency_key is MTA NYCT but in the service alert feed the alerts for MTA subway are published under the agency_key MTASBWY. 

What is the reason for formatting this way and what are the best practices for consuming your data with this formatting?

Please note -  We are pulling the combined service alerts feed. 

Thank you!

[Shen-Cruz, Dillon]

Hi Meira,

Thanks for flagging this! You're correct that there is a mismatch. I believe this mismatch should only affect NYCT subways and buses, who have different GTFS-RT service alert agency_ids ("MTASBWY" and "MTA NYCT", respectively) but the same static GTFS agency_id ("MTA NYCT"). Other agency_ids ("MTABC", "LI", and "MNR") should not be affected.

Unfortunately, this is a legacy issue we cannot solve quickly. If you are running into specific issues with consuming these feeds, please feel free to follow-up in this thread.

Thanks,

Dillon

Dillon Shen-Cruz (he/him) 

Metropolitan Transportation Authority 

Product Manager, Data and APIs

---

From: 'Meira Zimble' via mtadeveloperresources <mtadevelop...@googlegroups.com>
Sent: Wednesday, July 9, 2025 09:20
To: mtadeveloperresources <mtadevelop...@googlegroups.com>
Subject: [MTAdev] Mismatch between Service Alert Feed and Static Feeds

 

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[Meira Zimble]

Thanks Dillon! 

If the mismatch is stable and won't be changed in the near future - we will map on our end. 

Thank you!