Many Colorado drivers complain about the traffic on Interstate 25 through metro Denver. But Colorado doesn’t have money to add new lanes to I-25, and even if it did, motorists would see only temporary benefits until traffic increased so much that even the new lanes would become snarled. Now, a report from the Southwest Energy Efficiency Project (SWEEP) explains how to use market forces to improve the highway for the long-term, all at a reasonable cost.
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