uld be achieved is 3 s, how much Overtaking Establishment Sight Distance is quired to initiate a safe overtaking? swer:
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- The speed of overtaking and overtaken vehicles are 70 and 40 kmph, respectively on a two way traffic road. The average acceleration during overtaking may be assumed as 0.99 m/s². (1) Calculate safe overtaking sight distance. (ii) What is the minimum length of overtaking zone and draw a neat sketch of the overtaking zone and show the position of sign post.The speeds of overtaking and overtaken vehicles are 90 km/hr. and 70 km/hr. respectively on a two-way traffic road. The acceleration of overtaking vehicle is 4.5 km/hr./sec. and reaction time is 2 seconds. Calculate Safe OSD and Minimum length of overtaking zone?Calculate the minimum length of overtaking zone of a one way traffic road if the velocity of the overtaking and the overtaken vehicles are 110 and 60 kph, and the acceleration of the vehicle is 1.2 m/s^2. (Hint: overtaking sight distance is just a third of minimum length of overtaking zone).
- Problem 1: Textbook Problem 18.2W An intersection approach has an approach speed of 35 mph with an uphill grade of 1%. The width of the cross street is 59 ft and the length of the design vehicle is 18 ft. a. What is the displayed yellow time (rounded to the nearest second)? b. What is the displayed all-red time (rounded to the nearest second)?Develop a signal timing for the intersection shown below. Assume values as necessary (provide justification on the assumptions). Level terrain Driver reaction time (t) = 1.0 s Vehicle deceleration rate (a) = 10 ft/s² Length of typical vehicle = 18 ft PHF = 0.90 375 %3D One way 1,200 Target v/c = 0.95 Low pedestrian activity 60 ft Average approach speeds: 35 mi/h WB 40 mi/h NB Crosswalk widths = 10 ft 2,105 Crosswalk setback = 2 ft ↑ Walking speed = 4.0 ft/s NB grade = 3% WB grade = -1% l1 = e = 2.0 s 300 One way N 55 ftDevelop a signal timing for the intersection shown below. Assume values as necessary (provide justification on the assumptions). Level terrain Driver reaction time (t) = 1.0 s Vehicle deceleration rate (a) = 10 ft/s² Length of typical vehicle = 18 ft 375 One way PHF = 0.90 1,200 Target v/c = 0.95 Low pedestrian activity Average approach speeds: 35 mi/h WB 60 ft 40 mi/h NB Crosswalk widths = 10 ft Crosswalk setback = 2 ft 2,105 Walking speed = 4.0 ft/s NB grade = 3% WB grade = -1% l1 = e = 2.0 s 300 One way N 55 ft
- Q6:- Determine the time and space mean speed for a section of 1km if the required times for passing five vehicles are 1, 1.3, 1.2. 1.25 and 1.35min.?The design speed of a multilane highway is 60 mi/h. What is the minimum stopping sight distance that should be provided on the road if (a) the road is level and (b) the road has a maximum grade of 4%? Assume the perception-reaction time = 2.5 sec.Compute the minimum passing sight distance for the following data: Speed of the passing car=90kph, Speed of the overtaken vehicle=80kph, Time of initial maneuver=4sec, Average acceleration=2.4kph/sec, Time passing the vehicle occupies the left lane=9sec, Distance between the vehicle at the end of its maneuver and the opposing vehicle=80m
- The speeds of overtaking and overtaken vehicles are 80 kmph and 60 kmph respectively. If the acceleration of the overtaking vehicle is 2.5 kmph per second,calculate the safe passing sight distance for (1) single lane one way traffic (ii) three lane both way traffic. Assume perception time of driver = 2 sec.8. (15 points) Calculate the "clearance period," the "yellow time," and the "all-red period" for a signalized intersection. Assume that the initial vehicle speed, intersection length, and vehicle length are 45 mi/h, 44 ft, and 22 ft, respectively. Also, deceleration rate is 10 ft/s and driver reaction time is 1 second.A driver travelling at 50mph sees a hazard (boulder) at a certain distance ahead. The driver then applies the brakes immediately (PIEV) time is 2 seconds and begins slowing the vehicle at 10m/sec? (decelerating). If the distance from the stopping point to avoid hitting the boulder is 10.28m, how far was the car from the boulder upon perception?