Busses not considered wheelchair accessible?

[KlaasH]

I noticed this on PR #662 but it seems like it's true in production: when I check "Wheelchair accessible", the directions won't use busses. E.g. https://gophillygo.org/map/directions?origin=39.96581%2C-75.183494&originText=Fairmount%20Waterworks%20Interpretive%20Center&mode=TRANSIT%2CWALK&destination=39.9616133%2C-75.1541914&destinationText=990%20Spring%20Garden%20St%2C%20Philadelphia%2C%20Pennsylvania%2C%2019123
Without the wheelchair box checked, it says to take the 43 bus. With the box checked, it doesn't offer that itinerary, instead offering "walk the whole way" or "walk farther than the total distance to get to a PATCO station, ride PATCO one stop, then walk another mile". So that's kind of wacky in its own right, but the main point is: are the SEPTA busses not configured as accessible in our OTP data? Shouldn't they be?

[flibbertigibbet]

That is due to the SEPTA GTFS.

GTFS representation of accessibility is limited; it denotes wheelchair accessibility per trip, but for SEPTA, it depends on the vehicle and/or stop.