There is nothing worse than traveling for a long time and not being able to find a parking spot at your destination. Similarly, if you are in a hurry, it’s nice to know where there is a free parking spot even if it means having to park across the street. Unfortunately, it’s hard to know ahead of time how the parking situation is without having a person there to tell you. However, Google recently released an app in the Android Market called Open Spot which helps you find a parking spot in a .9 mile radius of your current location. No, Google will not be installing cameras at every parking lot to alert users when there is a parking spot available; instead, the app relies on users reporting when parking spots become available.
If you open the app and see a red pin, that means a user has pinged the location in the last few seconds. If the pin is orange, the user has pinged the location over 5 minutes ago. If the pin is yellow, the user has pinged the location over 10 minutes ago. After 20 minutes, the pin will disappear no matter what. In addition, Google is employing certain measures to help prevent against griefers who may ping fake parking spots which would definitely be frustrating for all involved. The app will only work if everyone with an Android app actively participates, but the only incentive to do so is something called karma points. Unfortunately, Karma points have no bearing on your account, so hopefully people will help each other out anyway to reduce traffic, pollution, and save time.
Read [Google Open Spot]