He rides in a bus or taxi and cannot get the driver to turn off the haraam music

Praise be to Allah.

If you cannot stop the music in the bus and you need to travel on it because the distance is too great, and you do not have any other means of transportation, then there is no sin on you for that, but you should denounce the evil as much as you can, even if it is only in your heart. 

And Allaah is the Source of strength. May Allaah send blessings and peace upon our Prophet Muhammad (peace and blessings of Allaah be upon him). End quote.