Use GPS mapping software already available and feed local real time traffic times into it to help GPS pick the fastest travel route and avoid accidents. Have app upload travel times constantly at each GPS intersection node. App can then feed data back to all other devices for use. Data could be mined at the metro level for transportation research purposes. Even better would be to feed in stop sign, traffic light and construction data into the equation so that the most efficient routes or preferred routes from a system use perspective could be highlighted.