Cost of high speed rail

The World’s Most Epic Railway Construction Projects Europe: 25 – 39 M USD / km USA: 56 M USD / km China: 17 M USD / km

Bicycle accidents

Cailynn Klingbeil in “I don’t usually wear a bike helmet. Does that make me an idiot?”: In Dr. Teshki’s Canadian analysis of helmet wearing which looked at 5 years of data from 2006 to 2011 the cycling hospitalization rate 633 per 100 million trips … of those only 25 percent involved an injury to the head or to the face. … bike share fatality rates are lower (even though people aren’t wearing helmets)

Autopilot vs. no autopilot crashes

Adjusted