Well I assume they use a payment processor like Bitpay, and the bus company doesn't want to hold onto crypto at all.  That's the case with pretty much all merchants--the volatility is a killer, plus they all have banks, and banks don't accept crypto deposits. 

I don't know if this is a great thing or not, because I'd still much rather use my pocket change for a bus ride, or buy a bus pass if I'm a frequent customer.  Now, if I could pay for the bus pass with bitcoin that'd be awesome...but not for me, because I'd rather hold onto my crypto.

The other thing I find interesting is that most merchants I've seen who take multiple coins usually take LTC.  I think if any of this is good for bitcoin, it should be good for LTC as well.