The familiarization visit in Curitiba was in 1996, almost 20 years ago. It's time they update themselves, do another visit, and learn from their experience. In the PH, planning take too long, and the project takes much longer, so the variables have changed. From planning to start of project should only within 5 years, and every 3 years the variables are updated. I know there are Pinoy planners who think otherwise, but things do change very quickly in the modern world.
Looking at the chart there, mmm.....they can turn the lines into tram lines at grade, (MRT 3 in Manila are trams) turn narrow streets into pedestrian mall, close off small side streets, go underground at major intersections or like SF, Boston, subway in downtown. I suppose they can use articulated buses instead of trams too but the coaches can only stretch so long.
I agree with the title... right now Curitiba is now planning to construct a metro under their line to decongest the BRT.
sinabi din yan ng Colombian consultant namin few months ago