Aside from the obvious cases where the bus is already full, negligence, laziness, shift is almost over, etc I gather that the routes may be timed and they are sometimes attempting to catch up to where they are supposed to be on the route? It seems I notice them sometimes trying to create some distance with another collectivo following closely behind. I've never asked them. Are the routes timed?
Yes the routes are timed, they put a stupid amount of pressure on the drivers to complete the route within a certain time regardless of cortes, congestion, what have you. SO you get idiot bus drivers who race through red lights (on cabildo you'll see 8 of them rush through a red), don't stop to pick up passengers, ignore people pulling the buzzer for a stop etc. This seems to have been behind a number of the bus accidents where they have hit cyclists, pedestrians etc. There are certain points where you'll see that an inspector might get on the bus for a moment or go round the drivers window to talk to him, they seem to be stamping them in/out at points along the route. I wonder if "on time schedule" made/'makes any difference to the amount of subsidies a line gets? Now with the SUBE card they can track how many people are getting on and off that info could be used not just for the subsidies but would be nice if it was actually used by the companies to analyse bottlenecks and figure out where/when they should be putting more buses on the routes.