I associate the word ‘pilot’ mainly with aeroplanes. Also, I think of small boats that help larger ones enter and leave ports. There is also, I believe, a creature called a ‘pilot fish’.
On arrival in Calcutta (now ‘Kolkata’) in West Bengal (India), I noticed that the local city buses have the word ‘pilot’ written on the doors that the bus drivers (i.e. pilots) use to enter their buses.
I am certain that I have never seen the word pilot used to describe a bus driver anywhere else I have visited.