At least for me, >90% of the annoyance caused by motorized vehicles is due to their exhausts. In my old city there was a spot where cyclists used to use the bu

At least for me, >90% of the annoyance caused by motorized vehicles is due to their exhausts. In my old city there was a spot where cyclists used to use the bus lane, combined with a stop. I would often have to wait behind the bus. Each time the bus started, it caused a bunch of smelly exhausts that I would breathe in directly. Absolutely horrible smell and also not a great feeling. The city then made a test with electric buses, and the bad smell was gone. Buses are the second worst only after mopeds, which have tiny motors so can't efficiently burn the gases. They are not just noisy but also leave a wake of horrible smell.