The next step in cruise control comes courtesy of Freightliner semis and GPS data company NAVTEQ. Freightliner broadened communication between the cruise control and map data: the GPS transmits information on the road ahead up to a mile, and then the cruise control computes the best speed at which to cover the distance with the greatest fuel efficiency.
It's called RunSmart Predictive Cruise, and it employs slope data from the NAVTEQ system that has been collected on 200,000 miles of the most used truck routes. While RunSmart is looking for peak efficiency, it won't sacrifice speed; the system remains within 6% of the set speed. It's an available option on Freightliner's Detroit Diesel DD15-equipped Cascadia model with the 72-inch raised roof.