[jasonpeacock]

Many cities are already upgrading their transit systems to implement "rapid ride" where they run buses on a 10min schedule through popular routes.

This eliminates the need for planning routes - go the nearest stop, wait 10-15min (sometimes buses get bunched up so it's not really every 10min), and get on the next bus.

Buses already have drivers, wheelchair (and bicycle!) support, etc. and the stops usually have live tracking of the next arriving buses.

[microtherion]

I recently came across an article on the early years of the Zürich streetcar. In the early 1900s, 5 minute schedules were customary, with one especially busy line running a 3 minute schedule!

In contrast, nowadays the peak schedule is 7.5min.