Saturday night, about 10 PM, I was driving along the northern edge of Chicago. The street’s 4 lanes with a planted median, speed limit 30. The section I was on goes through a residential area I know that’s fairly quiet, and I’ve driven this route frequently over the years. I heard some really loud BANG, which scared me a bit because I’ve NEVER heard anything like that in this area. I continue for 1/2 mile and encounter the source of the BANG: an accident that had just occurred at a side street intersection. I didn’t get a good look at the damage, but there was one car in the middle of the intersection and one just off the street I was on.