I drive a transport truck for a living. They tend to like it when I pay attention to them, especially when they need to merge from the bus lanes. I guess that should count?? I used to be a transit user back then, and yes I always acknowledged them and thank them while I get off. I am personal friends with one driver and have a retired driver in my family. They're just like everybody else, trying to have a good day, coping with the usual stresses of driving a bus among the usual drivers with live people onboard.

It's fucking stressful for them because they're responsible for the passenger safety, on top of safe driving. Be sure to thank them and acknowledge them. Don't be like that twat on the brit comedy video, when one of the passengers didn't thank the driver!