The experiments continue:
The program here is being closely watched by cities around the country. With the help of a federal grant, San Francisco installed parking sensors and new meters at roughly a quarter of its 26,800 metered spots. It tracks when and where cars are parked and, beginning last summer, began tweaking its prices every two months — giving them the option of raising them 25 cents an hour, or lowering them by as much as 50 cents — in the hope of leaving each block with at least one available spot.
The city also has cut prices at many of the garages and parking lots it manages, to lure cars off the street.
