When I lived near a busy roadway, the worst offenders by far were cars and motorbikes deliberately designed to be obnoxious. Regular traffic noise could be tune

When I lived near a busy roadway, the worst offenders by far were cars and motorbikes deliberately designed to be obnoxious. Regular traffic noise could be tuned out pretty easily, but then you'd get some jackass who deliberately removed their muffler revving their engine at midnight... Unfortunately people who do this are very rarely punished beyond maybe the occasional traffic ticket.