One thing that helps is that the transit authority (ie. DPP, routes that are run by other companies usually are not that good at keeping the schedule) seems to

One thing that helps is that the transit authority (ie. DPP, routes that are run by other companies usually are not that good at keeping the schedule) seems to genuinelly care about keeping the schedule. For streetcars there are online monitored checkpoints at least every kilometer or so (usually on each other stop, as part of the station sign, look for rectangular hole in the upper part) and buses are online GPS tracked, this dat is then used both to improve the scheduling and assess the driver's performance. Edit: another thing that certainly helps is that most transit lines do not go through the typically congested streets (eg. no daytime public transit goes through the Magistrala in city center) and if they do they are separated (eg. Jecna).