Which of the following is the stopping sight distance for a speed of 55 miles per hour (mph) on a flat grade roadway?

Question

Quizplus · Accepted Answer

The stopping sight distance (SSD) for a speed of 70 mph on a flat grade roadway is most nearly 492.4 feet. Solution: Use the SSD equation for flat grade (US Customary units) d = 1.47Vt + 1.075 V²/a Where, t = 2.5 seconds a = 11.2 feet/second² V = 55 mph d = 1.47 (55) (2.5) + 1.075 (55)²/ (11.2) = 202.1 + 290.3 = 492.4 feet

Which of the Following Is the Stopping Sight Distance for a Speed