Explore the complexities of transportation systems and their environmental impact in this comprehensive Stanford University lecture from the Understand Energy course. Delve into key topics including the big picture of transportation, externalities and policy implications, air pollution regulations, fuel policies, and vehicle efficiency standards. Examine the ongoing electrification of transportation, vehicle miles traveled, embodied energy, and the future of transportation. Gain valuable insights from Diana Gragg, Core Lecturer in Civil and Environmental Engineering and Managing Director of Explore Energy at Stanford's Precourt Institute for Energy, as she presents a thorough analysis of transportation's role in energy consumption and sustainability. Enhance your energy literacy and develop a deeper understanding of the challenges and opportunities in creating more sustainable transportation systems for the future.