The decision sight distance for a rural roadway with a speed of 50 miles per hour (mph) and a maneuver A is which of the following?

Question

Quizplus · Accepted Answer

The decision sight distance for a rural roadway with a speed of 50 miles per hour (mph) and a maneuver A is 460.5 feet. Solution: Use the Decision sight distance equation (Maneuver A) d = 1.47Vt + 1.075V²/a Where t = 3.0 seconds V = 50 mph a = 11.2 ft/s² d = 1.47(50) (3)+ 1.075(50)²/11.2 = 220.5 + 240 = 460.5 feet

The Decision Sight Distance for a Rural Roadway with a Speed