Earlier quoted context omitted.
> Public bus systems should really be exploring a smaller vehicle model more I asked someone from my local bus service once. Their answer was that it's not economically viable for the public bus service, as the only major saving was fuel cost and the extra services don't provide enough revenue to offset the employee cost (otherwise they could service it with the large normal busses). So basically this becomes viable…
I was just in St. Petersburg, Russia, and the city is chock-full of these tiny taxi-buses called "marshrutki". You can use the regular public transit card and everything — costs the same as a regular bus IIRC. Seems to work great and has since Soviet times.
1 - https://commons.m.wikimedia.org/wiki/File:Isuzu_Elf_Route-va...