Parking pay-on-demand system, up to $8 an hour, considered in San Francisco

It?s time to dig even deeper into your pockets if you?re trying to park in San Francisco. Parking meters could cost as much as $8 an hour in high-volume neighborhoods, or drop as low to 50 cents an hour on streets that don?t get much traffic, according to a new pay-on-demand system being considered by the San Francisco Municipal Transportation Agency. Christien Kafton reports.