How traffic jams end up costing the US economy billions of dollars

Experts call them "Phantom Traffic Jams," moments when traffic grinds to a standstill for no apparent reason. That traffic comes at a big cost, in both time and money. A new study found the average urban commuter spends about 54 hours each year sitting in traffic. It also costs the U.S. economy a grand total of $179 billion each year, according to the Texas A&M Transportation Institute. This video explores why they happen, and what can be done about them, now and in the future.