destination right on time only to discover that there are no free parking spaces. so you drive around and around and around. but now a new smart phone app is promising to make that experience a thing of the past. >> if you live in a big city like san francisco, you know how difficult it can be sometimes to find a meter's parking spot. san francisco has done something innovative. i want to show you how the technology works. it begins with what you're seeing here. this is a censor embedded in the street. it tells whether or not this parking space is free. that information ultimately gets uploaded to a smart phone app. when you fire it up, you can see a map of the city. dark means there are plenty of spots. light blue means it is getting tight. red means you can forget it. there is one word of caution though. when you're using this smart phone app, you definitely don't want to be driving at the same time. it can solve one of our most vexing problems. >> so the idea was to find a way to get people quickly into a porking spot. that helps us speed up our