Originally Posted by toomanybooks
I've never seen more screwed up traffic in my life since I moved to IL some years ago. Sometimes it seems as though ALL the roads are torn up ALL the time.
We have two seasons, winter and road construction.
Another possibility springs to mind. Often, driving near Chicago, there will be a huge backup for no reason. You crawl along for 20 minutes, then all of a sudden, traffic breaks free and you are going 60 again. No accident, no road construction, nothing at the site of the delay. Just a bottleneck for no reason.
It's the slinky effect (like how a slinky compresses and expands). There is an explaination on the
Straight Dope site.