I have a crowdsourcing app [0] that powers maps like this [1] in South Africa. Where I'm able to directly or indirectly get bus feeds for agencies, I'm able to augment them and provide a hybrid of live vs scheduled services.

It's been a fun project, both the app and the site. The idea with the app's that there's often numerous commuters on a bus/train vs relying on a hard to get vehicle telemetry feed/source. So I'm trying to get a fun/friendly way of getting commuters to share their location data in exchange for shared alerts and updates on delays.

Nothing novel, if you're in a first world country lol.

[0] https://socioloza.co.za/ [1] https://movinggauteng.co.za/gautrain

Transit telemetry is inherently spotty on these public-facing applications.

If it's like other systems, it will resort to transit schedule estimations when data is missing and then try to sync as live data becomes available.