Buses also contribute the beepbeepbeepbeep and PSSSSSHHHHHHHHHHHH and "Pedestrian, bus is turning" sounds. Living across from a bus stop, I all but ignored each of these.

My city soundscape has mostly hidden the sound of engines, save the rare Harley or Hemi. The sounds that penetrate the air (for me) are of both buses and cars blasting horns, music blaring, tires screeching, and the zooming of cars through air. That, and people taking loudly/yelling/screaming, the sounds of barking dogs, car alarms, fire truck/ambulance/police sirens, and air conditioners kicking on next door, and of course sounds from neighboring apartments.

But that's nice that the buses run quieter now.