Researchers have figured out a way to make your Prius even more efficient by tracking your route to work. Right now your car uses the battery until its power runs out and then starts dipping into your gasoline supply. It's a solution that works, but isn't the best use of power. Viktor Larsson from Chalmers University of Technology developed a system that analyzes that monotonous route you take to work (including that much-needed Starbucks detour), and then determines how to get the most out of your battery. For instance, your car might switch to gas on the highway where it's more efficient and save your stored power for the stop-and-go traffic in the office park.