- Federal Highway Administration. Office of Highway Policy Information – Highway Statistics 2016. https://www.fhwa.dot.gov/policyinformation/statistics/2016/vm1.cfm
- Forbes Magazine, citing Carinsurance.com. “How Many Times Will You Crash Your Car?” D. Toups. 27 July, 2011. https://www.forbes.com/sites/moneybuilder/2011/07/27/how-many-times-will-you-crash-your-car/
- Federal Highway Administration. Office of Highway Policy Information – Highway Statistics 2016. https://www.fhwa.dot.gov/policyinformation/statistics/2016/vm1.cfm
- The motor vehicle was invented in 1886. https://en.wikipedia.org/wiki/Car. The aircraft was invented in 1903. https://en.wikipedia.org/wiki/Airplane
- DroneZon. "How a quadcopter works with propellers and motors explained." F. Corrigan. 4 October, 2019. https://www.dronezon.com/learn-about-drones-quadcopters/how-a-quadcopter-works-with-propellers-and-motors-direction-design-explained/
- Background reading on Maglev rail: https://en.wikipedia.org/wiki/Maglev
- SpaceX. Hyperloop Alpha. https://www.spacex.com/sites/spacex/files/hyperloop_alpha.pdf
- Background reading on scramjet engines for hypersonic travel: https://en.wikipedia.org/wiki/Scramjet
- Background reading on the Concorde, the fastest commercial aircraft designed for transportation to date. https://en.wikipedia.org/wiki/Concorde
- CNBC. "Hypersonic flight technology just passed a 'hugely significant' milestone. C. Taylor. 10 April, 2019. https://www.cnbc.com/2019/04/08/hypersonic-flight-technology-passes-a-hugely-significant-milestone.html
- Background reading on space elevators: https://en.wikipedia.org/wiki/Space_elevator
- Background reading on magnetoplasmadynamic (Lorentz) thrusters: https://en.wikipedia.org/wiki/Magnetoplasmadynamic_thruster