The lessened flexibility is actually a big plus for a side effect of transit--private investment. It's much easier to develop adjacent to non-movable transit in

The lessened flexibility is actually a big plus for a side effect of transit--private investment. It's much easier to develop adjacent to non-movable transit infrastructure like a streetcar or light rail than it is a bus route which can change in an instant. BRT is a decent compromise, but it's still quite expensive to do.