I don't understand roads, so my human keeps me indoors, but many cats are allowed to roam free. They don't understand roads and cars either.
Cars are useful to them to shelter under in bad weather. But when they hurtle down the road,we can't judge their speed, so we usually just make a run for it. And that's dangerous.
Road traffic accidents are the number 1 reason for cat injuries, according to Agria insurance and it is the younger more confident cats exploring their territory who are most likely to be hurt.
It's time humans learned this. The most useful thing they can do is to make sure the cat flap is closed at night. That protects us quite a lot. Then there is the garden possibility, if we have a garden. Good fencing (details at www.icatcare.org) will keep us in but we still can have fun outside. It also keeps intruding cats out, which is a plus.
Some humans use reflective collars (though I don't like collars as they sometimes get caught and hurt cats). Others like me are kept indoors all the time and next week I will tell you how to make indoor life more enjoyable.