The Integrative Design for Radical Energy Efficiency Learning Hub is a cross-campus effort of the Precourt Institute for Energy.

Energy Efficient Mobility

Image by Sabine Kroschel from Pixabay

Introduction to
Energy Efficient Mobility

Transportation systems provide mobility and access to goods and services, with key modes including road, maritime, rail, aviation, and pipelines. Currently, over 90% of global transportation relies on oil, which represents nearly two-thirds of global oil consumption.

By applying integrative design principles, we can rethink how transportation systems function, reducing not just emissions but also the inefficiencies within the entire transportation ecosystem. Short distance travel is the easiest place to decarbonize transportation. Cars, light trucks, and motorcycles account for approximately 60% of energy used in transportation, and 98% of those vehicles run on gasoline. 

Because gasoline-powered vehicles are extremely inefficient (less than 1% of the car’s fuel moves the driver), decarbonizing personal vehicles is a priority and opportunity for reaching climate change goals. Electric vehicle (EV) use is one of the main ways to achieve this. Integrative design also encourages us to look beyond just the vehicle itself and optimize related systems, such as charging infrastructure, energy grids, and urban layouts, to maximize the benefits of electrification.

Decarbonizing long-distance travel via air, maritime, and long-haul road transport is more challenging, but whole-systems thinking offers potential pathways. Improvements in aerodynamics, lightweighting, and energy recovery technologies, combined with alternative fuels like hydrogen or biofuels, can reduce energy use across these modes. Furthermore, by addressing interconnections—such as reducing energy demands in freight systems by optimizing routes and transport loads—these sectors can also become more sustainable.

Before You Watch Our Lecture on
Energy Efficient Mobility

We assign these readings to our Stanford students alongside each lecture to help contextualize the lecture content. We encourage you to review the Essential readings below before watching the lecture. Include selections from the Optional and Useful list based on your interests and available time.

Essential

  • Reinventing Fire: Transportation (Executive Summary). RMI (formerly Rocky Mountain Institute). 2017. (2 pages)
    Describes the opportunity for making the transportation sector oil-free while providing enhanced personal mobility and freight services and saving money.
  • Reframing Automotive Fuel Efficiency. Lovins, Amory. SAE International. January 2020. (17 pages)
    Describes why traditional incremental technology analysis dramatically understates the fuel savings available from integratively designed vehicles and overstates their marginal cost, thereby preventing the realization of full vehicle efficiency potential. 

Optional and Useful

Our Lecture on
Energy Efficient Mobility

This is Stanford University's Integrative Design for Radical Energy Efficiency course lecture on energy efficient mobility. Given the length of this lecture (~2 hours), we have divided it into two separate videos. We strongly encourage you to watch both videos to fully understand the significant impact transportation systems have on our energy use and the wide range of opportunities that exist for making them far more efficient without increasing costs. For a complete learning experience, we also encourage you to review the readings we assign to our students before watching the lecture.

Amory Lovins

Presented by: Amory Lovins, Lecturer, Civil and Environmental Engineering, Stanford University; Co-founder and Chairman Emeritus of RMI
Recorded: February 2025  Duration: 2 hours 57 minutes

Mobility Part 1: Light Duty Vehicle Efficiency (70 minutes)

Table of Contents

(Clicking on a timestamp will take you to YouTube.)
0:00 Introduction to Mobility & History of Oil Use 
9:03 Efficiency Opportunities in U.S. Transportation 
13:17 How an Automobile Uses Energy 
16:49 Why Vehicle Weight Matters 
21:57 Designing More Efficient Vehicles 
29:16 Carbon-Fiber Composites 
50:14 Other Design Innovations 
59:18 Integrative Vehicle Design for Efficiency

Mobility Part 2: Electric and Heavy Vehicles (107 minutes)

Table of Contents

(Clicking on a timestamp will take you to YouTube.)
Part A: Electric Vehicles (34 min) 
0:00 Electric Vehicles (EVs) 
13:37 Vehicle-to-Grid (V2G) Integration 
21:46 EV Batteries: Maximizing Critical Minerals 
Part B: Transformations in Mobility Systems (18 min) 
34:14 Transformations in Mobility Systems 
35:04 Autonomous Vehicles 
36:38 Shared Mobility Services 
42:17 Mobility Revolutions in China and India 
Part C: Efficient Urban Mobility & Change in the Automotive Industry (6 min) 
51:43 Roads and Traffic Congestion 
53:13 Efficient Public Transportation 
56:09 Urban Design For Walkability 
57:13 Change in the Automotive Industry 
Part D: Efficient Heavy Vehicles (26 min) 
1:04:11 Efficient Freight Trucks 
1:08:14 Efficient Airplanes 
1:30:35 Efficient Ships and Military Vehicles 
1:42:21 Conclusion: Mobility Without Oil

Additional Resources About
Energy Efficient Mobility

Stanford University

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