"The automobile is an insect that eats cities, and its parking lots are a gangrene." -- From the always excellent Guy Davenport's essay Make it Uglier to the Airport.
Young people today can hardly imagine the carnival of horrors that untempered glass car windows and noncollapsable steering columns wrought on the occupants of cars that juddered about without airbags, seat belts and bumpers: tombs on wheels, they were. But even after safety innovations were deemed cost effect and enough crash tests were performed with live animals as dummies, today's roads and cars continue to claim too many lives because of poor infrastructure, our unsafe culture of speed and spatial ignorance, as well as pollution. The Swedes are hard at work to curb these deaths. Everyone else just pays lip service to their "Vision Zero." I read this book because I live in Toronto, a city that feels on the precipice of turning into a fuming parking lot that occasionally spasms to life to mow down elderly pedestrians who find themselves caught 500 meters between the nearest crosswalk. Our infrastructure and politicians have served the car well, while at the same time, cops enforce traffic less and less. The author of this short book submits the easiest solution is the noble speed bump "the sleeping policeman", swells of them, moguls of asphalt or plastic everywhere. If we can't get people out of their cars with mass transit, pedestrian malls, bicycles, or the unlikely appeal of a flaneur philosophy that evokes Baudelaire, we must try and get everyone to slow the fuck down and share the road in less homicidal ways.
Irreverent takeaway: people who fall from their jetskis at high speeds can experience high pressure hydraulic enemas that doctors call "rectal blowout."