Which of the following is the stopping site distance for a roadway with a speed of 35 miles per hour and a downgrade of 9%?

Question

Quizplus · Accepted Answer

The stopping sight distance (SSD) for a roadway with a speed of 35 mph on a downgrade of 9% is 287 feet. Solution: Use the SSD on grade equation (US Customary units) d = 1.47Vt + V²/30((a/32.2) - G) Where, t = 2.5 seconds a = 11.2 feet/second² V = 35 mph G = - 0.09 d = 1.47 (35) (2.5) + (35)²/30((11.2/32)-0.09) = 128.6 + 158.4 = 287 feet

Which of the Following Is the Stopping Site Distance for a Roadway