Even if you think what you would say is obvious, please add. This is genuinely something I think makes sense regarding local bus routes given the longevity of light rail and how infrequently routes change, but I also suffer from confirmation bias, so I’m hoping for reasons this would be a terrible idea but obviously would prefer reasons it would be an even more amazing idea than I thought.
While this is a point about implementation/regulation, and not about trams in general, it is an important point to make.
In my city of Hamburg, Germany, Iearned to avoid buses. Too often they get slowed down by traffic jams, which makes them late and unreliable.
Dedicated bus lanes, separated from cars, would solve the problem. Until they don’t have that, the U-Bahn and S-Bahn (which run on rails separated from traffic, underground or above street level) are my clear favorites.
A city which prioritizes public transit, would/could give street level trams priority at traffic lights, and maybe even disallow cars from using the tracks as a normal lane.