San Francisco has been working on making parking "smarter" for quite a while now, and it's just recently taken another big step in that direction by starting to replace over 5,000 older parking meters with the snazzy new model pictured above. Those will not only let you pay with a credit or debit card (and soon a special SFMTA card), but automatically adjust parking rates based on supply and demand, which means you could pay anywhere from $0.25 to $6.00 an hour depending on how many free spaces there are. Those rates are determined with the aid of some sensors that keep a c
