[kibwen]

I can name several places in Cambridge and Boston which are using dedicated bike+bus lanes as a solution to accommodating public transit and micromobility on our narrow streets. I'm sure that some bike people grumble about it, but the rest of us recognize that every person who decides to bus rather than drive is one less car that we have to contend with.

As for streetcars, Philadelphia shows that you can mix streetcar lanes with car lanes.

[madcaptenor]

I have lived on a streetcar line in Philadelphia and sometimes people double-park. It's not ideal.