This should include bus, metro rail, suburban rail, shared cabs and other modes.
INTEGRATED Planning and ADMINISTRATION (single entity) for a city/metro area is key.
Also, it is critical that eventually all different public transit authorities in a city/metro are also integrated into a single entity (Like in many global cities).
Today many cities are drawing out 5-10 year metro rail plans - but where are the bus service plans? Are they connected?
Metro rail is necessary, but not sufficient.