Automatically Notify User When Port Authority Servers Are Down

[epicstar]

Currently, the app tells users that there are either:

1. no buses available
2. server is down (due to timeout)

Since Port Authority's TrueTime API isn't completely RESTful, I need a heuristic to tell users that their servers are down. I was thinking of:

If the server returns us no vehicles, check the time. If not between 2AM and 6AM, check if any of the 61's or 71's are running. If they aren't running, then the servers are most likely down.