State transportation departments are considering using high-tech maps to measure how much fuel is saved from driving on repaved highways, thanks to a new pavement-vehicle-interaction test developed at the Massachusetts Institute of Technology (MIT). "We are moving into a new era of pavement management systems, which consider not only rider comfort and safety but also the quantitative carbon environmental impact," says Franz-Joseph Ulm, director of MIT’s Concrete Sustainability Hub (CSH), an industry-funded research center that focuses on ways to reduce the material’s 5% to 10% global carbon footprint.