Increase W004 vehicle speed is unrealistic threshold

[barbeau]

Summary:

We currently have the W004 threshold set at 26 meters per second (about 60 miles per hour):
https://github.com/CUTR-at-USF/gtfs-realtime-validator/blob/master/RULES.md#W004

We should bump this to around 80 miles per hour to avoid catching buses on interstates serving more rural areas.

Steps to reproduce:

Run validator on feed with buses on interstate

Expected behavior:

Don't flag speeds unless they are very unreasonable

Observed behavior:

Speeds are flagged too often

Platform:

N/A

[derhuerst]

We should bump this to around 80 miles per hour to avoid catching buses on interstates serving more rural areas.

There are many trains that regularly reach 120 miles per hour, some even 200. Can we pick a rather conservative threshold here? instant (or almost instant) stop-to-stop travel would still be recognised.

[isabelle-dr]

In the Schedule Validator, speed limits depend on the route type (you can see the code here). Would it make sense to have something similar here?