| http://www.w3.org/ns/prov#value | - And the daily rush hour periods, where the likelihood of encountering congestion is highest, have grown from an average of 4.5 hours to a 7.1 hour expanse, covering nearly a third of every day.One cause of this gridlock is a practice that sprang from the increasingly powerful "smart growth movement, and has been implemented in almost every American city and in many suburbs: traffic calming.Propon
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