Originally Posted by
sweeks
Sadly, I agree with you. My only supporting evidence (case report, n=1) is 27,000 miles of commuting in Chicago with consistent mirror use and no rear strikes. Not much to go on, but I *have* had a few evasive actions based on the mirror, so do I believe I am safer.
From what people have posted about riding in Chicago, anything that gives you confidence is probably a good thing.