alt Hacker News> It will (again by definition) never be a viable alternative to driving
I don’t follow the logic here. Why would a bus (periodically) getting stuck in traffic forever invalidate it in comparison to getting stuck in the same traffic in a car?
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If buses and cars participate in the same road traffic (i.e. the bus doesn't have dedicated lanes), then a bus trip will never be faster than a comparable car trip. This is because you have to walk to/from the bus stop at both ends of the journey, wait for a bus to show up, ride the bus and have it stop for other passengers, transfer between routes, the bus has slower acceleration and turning than a car, etc.
Think about even the most strawman trip possible: A bus rider and a car driver start exactly at the location of a bus stop, the bus shows up exactly at the start time, both contestants ride/drive straight for a few kilometres (which happens to follow exactly one bus route, without changing buses; but the bus might stop a few times along the way for other passengers), and end exactly at a bus stop. The car will win every single time.
https://en.wikipedia.org/wiki/Downs%E2%80%93Thomson_paradox , https://www.youtube.com/watch?v=RQY6WGOoYis
In aggregate, people go the fastest way - no way to stop this from happening. In places where everyone takes public transit, the transit is fast. To make more people take public transit, you make the transit fast.
Reserving lanes as bus lanes can actually speed up car traffic by making more people switch to bus.