Guided BRT, state of the art

Simple low cost, high speed trackways.

The O-bahn design is unique among public transport systems; busways typically use dedicated bus lanes or separate carriageways, but the O-Bahn runs on specially built track, combining elements of both bus and rail systems. Adelaide's track is 12 kilometres (7.5 mi) long and includes one station and two interchanges: Klemzig Station in Klemzig, Paradise Interchange in Campbelltown and Tea Tree Plaza Interchange in Tea Tree Gully. Interchanges allow buses to enter and exit the busway and to continue on suburban routes, avoiding the need for passengers to change. Buses travel at a maximum speed of 100 km/h (62 mph), and the busway is capable of carrying 18,000 passengers an hour, from the Central Business District to Tea Tree Plaza in 15 minutes. Services are operated by Torrens Transit under contract from Adelaide Metro, an agency of the South Australian Department for Transport, Energy and Infrastructure.O-Bahn Busway

Digital guidance can control position much better than steel track, computing faster than steel vibrations.

Also works just fine on regular roads

Even on regular roads we can automate the driving and use coordinated communications.

The take away here is that automated only lanes look to be real cheap to build, closing in on $3-5 million per mile. But the darn things can just drive off the track and cruise around town. There is no way passenger rail can compete.