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.
With good planning of infrastucture this is less of a problem. I say this as someone who’s suffered minor head injury and minor TBI because of the mentioned problem. Only reason for this was I was obeying the law in a place where the only legal place to cycle was in this case the most dangerous one too, and where I had cycled numerous times before without an incident. Now it luckily has a separate path for cyclists, and soon the tram tracks are located in a place where you’d have to do mad stunts to “get into the groove” (no pun intended).