A tiny suggestion: the field where you type the route should say "Or type it and click go", not just "Or type it and click." It's a little clearer. I see that you fully spell it out at the very top, but I skipped past that, and I suspect a lot of other people will, too, because it's so small.
They have a mobile app version. I've been using it for years. You get yellow arrows instead of buses, and it's route specific. Sometimes busses disappear.
This is impressive, though -- good job.