It's not the same, but I've tried to create a free browser-based app to track bus lines where I live (Brazil), but I had to pause this project, as each city uses a different way to track their public transportation, and it would be hard to gather all the info in a way to be usable in the whole country.
It's nice to see something similar implemented to track the transportation in another country.
For now, I have 8 apps and I'd be grateful if any of you could give me your impressions.
I'd be happy too if any of them could be helpful for you.
https://dailypocketapps.com