Wired, Forbes, and the Telegraph have all reported on the Speed Vest, recently introduced by DIY inventors Brady Clark and Mykle Hansen. The vest, which displays a bike rider's speed in large illuminated numerals on the back, is designed to make others aware that bicycling is a fast, efficient way of getting around.
"Have you ever outpaced cars and been honked at? Had a car almost wipe you out while making a turn?" the inventors write. "The Speed Vest was invented because we were curious to know if putting more information in front of drivers might change their awareness of bicyclists. That, and we suspect a lot of people don’t realize that an average person can bike 10-15 mph (15-25 km/h). "
You can't buy one of these yet, but bike advocacy organizations can borrow a prototype version for outreach and education by contacting firstname.lastname@example.org. Learn more about the mechanics here and read an interview here.