Now, engineers at the University of California, Riverside, are working on “dynamic” eco-driving, in which drivers get real-time feedback and advice on how to improve their fuel efficiency and cut carbon dioxide emissions. Within five years, researchers say, computer screens on the dashboard will likely tell drivers when to slow down to anticipate a red light, what the optimum fuel-efficient speed is for the stretch of freeway they’re on and whether to change lanes to maintain a consistent average speed.

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