Have you been to Amman Jordan, Bogotá Colombia, Minneapolis or Washington, D.C. USA, Thessaloniki Greece, Manila Philippines, Jakarta Indonesia?
All face increased congestion for regular traffic which directly leads to feeder lane issues and regular unauthorized traffic when people who can't use bus routes end up driving on the bus lanes so they don't lose thei jobs and end up homeless. But hey, the state collects fines from them, fuck them for existing in a society where owning a car is a life necessity, all that matters is buses are up to 30% faster, right?
High speed trains can make travel practical for way more people, and should be prioritized, with ground public transport to augment last mile. Buses shouldn't replace trains as the primary method of public transport, and building them dedicated roads when the metro isn't sufficient is resource wasting.