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If you want to cut through city traffic, and you don't mind breaking the law to do it, impersonating an officer is probably your best bet.

So this car was painted in the same green and black color scheme as 85 other Cadillacs that were supplied to Chicago police and city officials. It also had flashing red lights behind the grill, a regulation police siren and a police-band radio.

by Peter Valdes-Dapena, senior writer @CNNMoney - Last updated September 27 2012: 3:15 PM ET
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