Nantes' Busway isn't just separate bus lanes though, they get the same level of priority as a tramway, they run straight through roundabouts and other intersect

Nantes' Busway isn't just separate bus lanes though, they get the same level of priority as a tramway, they run straight through roundabouts and other intersections, with lights turning blinking red for cars when the bus approaches. They also stop at every stop unlike regular buses (and they mostly use elevated platforms so there isn't a step to get in or out, IIRC).