Electric Car Batteries, Harrison Enright, Nov. 30, 2016, Stanford University 2016
 The Ultimate Guide to Electric Car Charging Networks, Fred Berman, Plugin Cars
 Intel Starts Testing Self-Driving Cars in Jerusalem, Megan Rose Dischay, Techcrunch, May 12, 2018
 You May Not Live Long Enough To Ride A Driverless Car, Jeremy Gelbart, April 1, 2017, Newsweek
 The Autonomous Car Company That’s Selling Safety First, Max Chafkin, May 16, 2018, Bloomberg
 Hyperloop pictures illustrate an airlock at the end of the tube, a second airlock several feet further in, and a transition chamber in the middle for a pod. For a loaded pod to be launched into the Hyperloop the first airlock must open, the pod enter, the first airlock close, the second airlock closes, the cycle is ready to restart. The length of this cycle establishes the maximum capacity. The cycle may be several minutes. For example: Assume one (1) minute cycle time, 720 MPH cruise velocity, 50 passengers per pod, and 2400 miles tube length. In the one minute, a pod travels 12 miles in the tubes. There will be 12 miles separation between pods. With one minute cycle, the capacity is clearly 60 pods per hour and with assumed pod capacity that gives the 3000 passengers per hour.