There is a black box in the aircraft to record fly data. Why there is no such thing in the car. I think it is not difficult to build a GPS data logger for car which record position and speed for every day driving. Did I miss something.
There is. There are several commercial units available for under $250, and Sparkfun even has one on the site - not a new project. Many have ways to link to googleearth to see where you have been on a ap and let you log the trips.
Cheers,
Wreno