Design a High Speed Exit Taxiway by calculating: a. Distance of the taxiway exit from the threshold (Se) b. Required length (d2) of the high speed exit c. Minimum separation (X) between the runway and parallel taxiway d. Time spent decelerating on the runway Given: Design aircraft is B747-400 with Touchdown speed = 170 knots Runway exit speed = 45 knots Taxiway exit speed = 12 knots Aircraft lands 1500 ft from approach threshold Taxiway Exit = 35 Aircraft deceleration is: a = -5 ft/sec2 on the runway a = -3.3 ft/sec2 on the taxiway