In what situations should people not wear headphones?

For me, there are several situations in which I would not use headphones. Firstly, I would not use headphones if I am on the road. When I'm riding a bike, I would avoid using headphones to focus on the road signs and the background noise to prevent creating a dangerous situation. Secondly, I would like [...]

I think people who are driving or riding should not wear headphones because they cannot hear sounds from the environment or from other cars. There may be some traffic accidents.