# GTFS-Realtime getVehiclePosition source data refresh interval for Sydney Trains

**URL:** <https://opendataforum.transport.nsw.gov.au/t/gtfs-realtime-getvehicleposition-source-data-refresh-interval-for-sydney-trains/163>\
**Category:** Real-time Public Transport\
**Created:** [June 10, 2016, 1:52am UTC](https://opendataforum.transport.nsw.gov.au/t/gtfs-realtime-getvehicleposition-source-data-refresh-interval-for-sydney-trains/163 "2016-06-10T01:52:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![slee227](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@slee227](https://opendataforum.transport.nsw.gov.au/u/slee227)\
**Post date:** [June 10, 2016, 1:52am UTC](https://opendataforum.transport.nsw.gov.au/t/gtfs-realtime-getvehicleposition-source-data-refresh-interval-for-sydney-trains/163/1 "2016-06-10T01:52:47Z")

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Hi,

What is the current refresh interval time for the Sydney Trains GPS location data source? (Used in the GTFS-Realtime getVehiclePosition)

I did a rough estimation and it looks like around 15-20 seconds before the next update but would be good to confirm this please.

Thanks a lot,

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**Author:** ![jxeeno](https://sea1.discourse-cdn.com/flex019/user_avatar/opendataforum.transport.nsw.gov.au/jxeeno/32/210_2.png) [@jxeeno](https://opendataforum.transport.nsw.gov.au/u/jxeeno)\
**Post date:** [June 10, 2016, 3:55am UTC](https://opendataforum.transport.nsw.gov.au/t/gtfs-realtime-getvehicleposition-source-data-refresh-interval-for-sydney-trains/163/2 "2016-06-10T03:55:49Z")

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@yvonne.lee has indicated to me that the update interval is 15 seconds

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**Author:** ![slee227](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@slee227](https://opendataforum.transport.nsw.gov.au/u/slee227)\
**Post date:** [June 10, 2016, 5:01am UTC](https://opendataforum.transport.nsw.gov.au/t/gtfs-realtime-getvehicleposition-source-data-refresh-interval-for-sydney-trains/163/4 "2016-06-10T05:01:54Z")

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thanks alot for your clarification!

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**Author:** ![yvonne.lee](https://avatars.discourse-cdn.com/v4/letter/y/c37758/32.png) [@yvonne.lee](https://opendataforum.transport.nsw.gov.au/u/yvonne.lee)\
**Post date:** [June 14, 2016, 2:03am UTC](https://opendataforum.transport.nsw.gov.au/t/gtfs-realtime-getvehicleposition-source-data-refresh-interval-for-sydney-trains/163/5 "2016-06-14T02:03:43Z")

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Good pickup. We’ll add some info to the Troubleshooting page  
[https://opendata.transport.nsw.gov.au/site/en\_us/gs-troubleshooting.html](https://opendata.transport.nsw.gov.au/site/en_us/gs-troubleshooting.html)