On July 23, 2015 at 05:16, Ernie Gilman said...
Thanks, KOT....
60 mph is 88 feet per second, so 30 mph is 44 feet per second.
The vehicle is 15 feet from the crosswalk, and 15/44 = .34 seconds.
Usain Bolt did the 100m in 9.58 seconds.
At that speed, in .34 seconds, he'd go 3.55 meters = 11 2/3 feet.
Poor Usain is therefore dead.
But your average Joe friend isn't worried.
Don't forget to account for reaction time.