Low capacity last mile routes: Battery electric and streetcar power grid connected buses with battery backup for emergency/construction detours
Medium capacity: Bus rapid transit with future upgrading to level ground electric trams. Route needs an actual 4 dedicated lanes as the 3rd and 4th lane is for buffer (sound control, medians and for future construction rough in safety). Stops every quarter. Road crossings must have a speed bump or curb with sharp turns to force cars and trucks to slow down and stop before being allowed to cross the crossing. Bike way construction nearby is encouraged. Netherlands, Swiss and Swedish cities have really nailed this system
High capacity: Full on high speed metro system on dedicated, uninterrupted track (Underground or above ground with no crossings. I don't expect Singapore, Tokyo, Busan, Hong Kong and Seoul quality metros but we should stive to those found in Scandinavian cities like Stockholm or Helsinki. Unfortunately for Canada, there are many places where such electric vehicles will never work due to extreme operating ranges. Range anxiety is not some worry, it's a very real life or death threat on very long lonely stretches of highway