# Sydney Trains Real Time - Missing Etas

**URL:** https://opendataforum.transport.nsw.gov.au/t/sydney-trains-real-time-missing-etas/1135
**Category:** Real-time Public Transport
**Created:** [January 11, 2018, 7:24am UTC](https://opendataforum.transport.nsw.gov.au/t/sydney-trains-real-time-missing-etas/1135 "2018-01-11T07:24:28Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![morpeer](https://avatars.discourse-cdn.com/v4/letter/m/d2c977/32.png) [@morpeer](https://opendataforum.transport.nsw.gov.au/u/morpeer)
#### Post date: [January 11, 2018, 7:24am UTC](https://opendataforum.transport.nsw.gov.au/t/sydney-trains-real-time-missing-etas/1135/1 "2018-01-11T07:24:28Z")

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We are using this link to get the real time for Sydney Trains -  
[https://api.transport.nsw.gov.au:443/v1/gtfs/realtime/nswtrains/GTFSRTripUpdate](https://api.transport.nsw.gov.au:443/v1/gtfs/realtime/nswtrains/GTFSRTripUpdate)

The real time feed is missing the real time arrivals data - all the data is:  
stop\_time\_update {  
arrival {  
delay: 0  
}  
departure {  
delay: 0  
schedule\_relationship: SCHEDULED

Is there a known issue?

Thanks,  
Michal

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### Author: ![Lockie](https://avatars.discourse-cdn.com/v4/letter/l/82dd89/32.png) [@Lockie](https://opendataforum.transport.nsw.gov.au/u/Lockie)
#### Post date: [January 11, 2018, 8:20am UTC](https://opendataforum.transport.nsw.gov.au/t/sydney-trains-real-time-missing-etas/1135/2 "2018-01-11T08:20:19Z")

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If you pay attention to the name, TripUpdate, you’ll kind of get an understanding of why the ETA isn’t there. The TripUpdate only tells you delays (update) for the trip. You then have apply the delay to the trip from the GTFS files that you would have downloaded (stop\_time.txt, trips.txt, calendar.txt, etc) yourself.

I’ve never seen ETA present in the trip updates - hope this helps!

EDIT: ETA isn’t defined in the guidelines: [GTFS Realtime Reference &nbsp;|&nbsp; Realtime Transit &nbsp;|&nbsp; Google Developers](https://developers.google.com/transit/gtfs-realtime/reference/#message_stoptimeupdate)