I'm sort of in that situation now, though not a kid. I biked around all the time as a kid and in college, but for some reason it's a lot scarier when I do it n

I'm sort of in that situation now, though not a kid. I biked around all the time as a kid and in college, but for some reason it's a lot scarier when I do it now, even in areas with not so much traffic. So I don't bike any more, and miss out on a lot of exercise. Weirdly, in the old days I never felt like I needed a rear view mirror when biking, but now I always worry about cars coming up behind me without my noticing. I don't know what has changed.