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This could be used to get instant check on vehicle speeds.
Which could be used by traffic police for lodging fines to the driver for over-speed driving offence.
There are a number of OBDII connectors that go with apps like fun2drive, torque pro etc. These apps will help you store data locally on your android phone. Maybe you can build an app to upload the real time data to a server! I do not know of any app that uploads realtime OBDII data.