1. 1 Challer, Bruce. 2017. Turns out, Uber is clogging the streets. New York Daily News, February 27. Retrieved from https://www.nydailynews.com/2017/02/27/turns-out-uber-is-clogging-the-streets/.
2. 3 U.S. Bureau of Economic Analysis. Personal Consumption Expenditures and Gross Domestic Product. Retrieved from FRED, Federal Reserve Bank of St. Louis, https://fred.stlouisfed.org/graph/?g=hh3.
3. 5 Challer. 2017. Retrieved from https://www.nydailynews.com/2017/02/27/turns-out-uber-is-clogging-the-streets/.
4. 6 (Muoio, D. 2017. These 19 Companies Are Racing to Build Self-Driving Cars in The Next 5 Years. Business Insider UK, January 12. Retrieved from https://www.businessinsider.com/companies-making-driverless-cars-by-2020-2017-1?r=US&IR=T). (Stewart, J. 2016. Tesla's Self-Driving Car Plan Seems Insane, But It Just Might Work. Wired, October 24. Retrieved from https://www.wired.com/2016/10/teslas-self-driving-car-plan-seems-insane-just-might-work/). (Fortune. 2017. GM and Lyft Plan to Deploy Thousands of Self-Driving Chevy Bolts. February 17. Retrieved from https://fortune.com/2017/02/17/gm-lyft-chevy-bolt-fleet/) (Johnson, C. and Walker, J. 2016. Peak Car Ownership: Market Opportunity of Electric Automated Mobility Services. Rocky Mountain Institute. Retrieved from https://rmi.org/wp-content/uploads/2017/03/Mobility_PeakCarOwnership_Report2017.pdf).
5. 7 Source: US Bureau of Transport Statistics. 2001. National Household Travel Survey. Retrieved from https://www.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/publications/highlights_of_the_2001_national_household_travel_survey/html/section_01.html.