Being stuck in traffic is a bad example because it’ll only affect you if you’re driving. Better examples focus on things that’ll affect you regardless of you driving or not, like:

• air pollution - the fact that you are breathing all that NOx and ozone produced by the others’ cars
• wasting urban space - that bakery could be next door, but it’s further away because all those car drivers need lots of lanes and parking spots for cars
• risk of being run over by a car - or, one of the reasons why your kids can’t play outdoors, like you did in your childhood
• etc.

Beyond that, both are rationally equivalent. But their rhetoric power is different, as one plays along with your desire to live a better life, another with your conscience (most people don’t give a shit about the others).