Donald Shoup in the New York Times:
In a recent survey conducted by Bruce Schaller in the SoHo district in Manhattan, 28 percent of drivers interviewed while they were stopped at traffic lights said they were searching for curb parking.
They’re searching for curb parking because it is much cheaper than garage parking. It is not set at the market rate and so the roads end up clogged. Another reason to be against price control.
(Hat-tip: Peter Gordon)