One of the toughest environmental and social challenges of our time is managing the mobility of people and goods. By 2030, passenger traffic will exceed 80,000 billion passenger-kilometers—a fifty percent increase—and freight volume will grow by 70 percent globally. In fast-growing places like India, China, sub-Saharan Africa, and Southeast Asia, billions of people will have higher lifestyle expectations, and new mobility aspirations. Mega projects like the China’s One Belt, One Road will connect more than half of the world’s population and roughly a quarter of the goods and services that move around the globe through maritime links and physical roads. Globally, the number of vehicles on the road is expected to double by 2050.