Humans try to control traffic and do not do a very effective job. Mother Nature on the other hand can control traffic quite well. During a typical rush hour in Boston Storrow Drive is a parking lot. I ride right next to Storrow and a major bummer is a noise caused by the traffic. Today? No noise.
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As far as commutes go, it was one of the best ever. It will be interesting to see what happens over night, however my commute with normal tires on the bike bath (sp. path) was great. Sorry, I'm not going to try to scare you like the professional news people.