This concept was brought up in one of the Patlabor anime movies, except instead of buses, it was police/fire/ambulance/emergency vehicles that could move over c

This concept was brought up in one of the Patlabor anime movies, except instead of buses, it was police/fire/ambulance/emergency vehicles that could move over congested traffic to get to an accident scene more quickly. Kudos to the Chinese for being willing to try it out, but the concept existed at least in 2001(if it was Patlabor 3) or 1993(Patlabor 2)