Will self-driving cars help or hurt efforts to cut emissions? Don MacKenzie Civil & Environmental Engineering

Transcription

1 Will self-driving cars help or hurt efforts to cut emissions? Don MacKenzie Civil & Environmental Engineering

2 When is automation coming?

3 Partial automation is already mainstream Lane keeping Traffic jam assist / low speed follow Adaptive Cruise Control Automated Emergency Braking

4 Applications requiring (near) universal automation are decades away 4

5 Market intro. to peak growth is ~10 years, could be ~5 years by 2030 S. Zoepf & J. Heywood (2012). Characterizations of Deployment Rates in Automotive Technology, SAE International Journal of Passenger Cars - Electronic and Electrical Systems 5 (2)

6 New automotive features rarely grow by more than 10% per year S. Zoepf & J. Heywood (2012). Characterizations of Deployment Rates in Automotive Technology, SAE International Journal of Passenger Cars - Electronic and Electrical Systems 5 (2)

7 It will be decades before all vehicles can drive themselves. Fraction of New Vehicles Equipped Initial market introduction year developmental lag 10% maximum growth Fleet Turnover 60% of cars last 15+ years Average US car is 11 years old 7

8 What will automation mean for energy demand and emissions?

9 Energy and environment are not driving the conversation on automation, but Capacity Safety Access Comfort / Time Use 9

10 Automation offers substantial energy & environmental benefits Travel Demand Per-mile / per-minute pricing Design Right-sizing Lower performance Reduced crashworthiness New vehicle concepts Fuels Lower infrastructure costs Self-refueling Mode Structure On-demand mobility Robo-taxis Shared vehicles Personal transit Occupancy rates Operations Platooning Congestion relief Traffic smoothing Eco-driving Optimal speed/routing 10

11 Automation offers substantial energy & environmental benefits and risks Travel Demand Per-mile / per-minute pricing Underserved populations Lower cost (VOTT) Land use changes Design Right-sizing Lower performance Reduced crashworthiness New vehicle concepts Mobile Barcalounger Fuels Lower infrastructure costs Self-refueling Mode Structure On-demand mobility Robo-taxis Shared vehicles Personal transit Occupancy rates Deadheading Operations Platooning Congestion relief Traffic smoothing Eco-driving Optimal speed/routing Highway speeds 11

12 Our goal was to place some bounds on these impacts and explore net effects 12

13 Automation making vehicle travel cheaper, safer, more convenient, will increase demand "It was the same distance, but the commute felt like it took half the time" 13

14 The biggest risk* from automation comes from induced demand Platooning Congestion mitigation Eco-driving Higher highway speeds Travel cost reduction Increased features Infrastructure footprint* Improved crash avoidance De-emphasized performance New user groups Vehicle right-sizing Changed mobility services Wadud, Z., MacKenzie, D., & Leiby, P. (2016). Help or hindrance? The travel, energy and carbon impacts of highly automated vehicles. Transportation Research Part A: Policy and Practice, 86, % -20% 0% 20% 40% 60% % changes in energy consumption due to vehicle automation 14

15 Emerging consensus that mobility services are key to unlocking many benefits of automation. Pay per trip Ride sharing Automation Mobility Services Right-sizing Fewer cold starts Facilitates EVs 15

16 Paying by the trip is expected to reduce travel demand Bösch, P.M., Becker, F., Becker, H., & Axhausen, K.W. (2017). Cost-based Analysis of Autonomous Mobility Services. Working paper 1225, Institute for Transport Planning and Systems, ETH Zurich. January,

17 (Full) Automation makes mobility services more feasible, and more essential Platooning Congestion mitigation Eco-driving Higher highway speeds Travel cost reduction Increased features Infrastructure footprint* Improved crash avoidance De-emphasized performance New user groups Vehicle right-sizing Changed mobility services -60% -40% -20% 0% 20% 40% 60% % changes in energy consumption due to vehicle automation 17

18 Questions for you How many of you have used Uber, Lyft, or a similar service? How many of you have used UberPool, Lyft Line, or a similar service? Why? 18

19 Shared cars are not the same as shared rides $2.00 Solo Shared Cost of a Lyft ride in Seattle $1.35/mi + 3 min/mi x $0.20/min = $1.95 / mi $1.50 Automation reduces incentive to share rides $1.00 $0.50 $0.00 With Driver Car only 19

20 By reducing total cost of mobility services, automation reduces incentive to share rides Bösch, P.M., Becker, F., Becker, H., & Axhausen, K.W. (2017). Cost-based Analysis of Autonomous Mobility Services. Working paper 1225, Institute for Transport Planning and Systems, ETH Zurich. January,

21 With safe, on-demand mobility, we could "right-size" vehicle for specific trips' needs 21

22 With safe, on-demand mobility, we could "right-size" vehicle for specific trips' needs

23 How much right-sizing will consumers embrace?

24 Mobility services providers are already starting to right-size By Wakasui - Own work, CC BY-SA 4.0,

25 Right-sizing is largest opportunity Platooning Congestion mitigation Eco-driving Higher highway speeds Travel cost reduction Increased features Infrastructure footprint* Improved crash avoidance De-emphasized performance New user groups Vehicle right-sizing Changed mobility services -60% -40% -20% 0% 20% 40% 60% % changes in energy consumption due to vehicle automation 25

26 Shared mobility fleets should have fewer emission-intensive cold starts Rule of thumb: 80% in first 30 seconds, 90 % in first 5 minutes L. Gaines, E. Rask, and G. Keller. Which Is Greener: Idle, or Stop and Restart? Comparing Fuel Use and Emissions for Short Passenger-Car Stops. TRB Paper No

27 Will car ownership end in major cities? 27

28 What happens when you want to go off the beaten track? 28

29 A suite of services can help 29

30 The Vision: Shared, automated, electric vehicles

31 Automation could facilitate alternative fuels adoption Less range anxiety Reduced infrastructure investment Greene, D.L., Fuel availability and alternative fuel vehicles. Energy Stud. Rev. 8 (3),

32 Mobility services fleets can make electric vehicles more cost effective 32

33 How do impacts evolve over time?

34 Impacts will likely depend on level of automation Platooning Congestion mitigation Eco-driving Higher highway speeds Travel cost reduction Increased features Infrastructure footprint* Improved crash avoidance De-emphasized performance New user groups Vehicle right-sizing Changed mobility services SAE Level % -40% -20% 0% 20% 40% 60% % changes in energy consumption due to vehicle automation 34

35 Thank you!

36 Appendix: SAE levels of automation

37 SAE has emerged as preferred taxonomy for levels of automation SAE J3016 Standard 37

38 SAE emphasizes "who does what, when" SAE J3016 Standard 38

39 SAE emphasizes "who does what, when" SAE J3016 Standard 39