Determine the stopping sight distance (SSD) when a vehicle is traveling at 50 mph on a road with G 5.5% downgrade.
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- The following are specifications for traffic design of a highway:Speed of the passing car = 100 kphSpeed of the overtaken vehicle = 80 kphTime of initial maneuvers = 5 secTime passing vehicle occupies left lane = 10 secsDistance between the passing car and opposing car at the end of maneuver = 20 mAverage acceleration = 2.5 kph/sec. 1. Determine the required total passing sight distance for said road a. 502.75 m b. 602.75 m c. 702.75 m d. 402.75 m 1. Find the minimum required passing sight distance. a. 280.37 m b. 390.37 m c. 48.37 m d. 490.37 mCompute the minimum passing sight distance forthe following data. Speed of passing car – 90kph Speed of overtaken vehicle – 80 kph Time of initial maneuver – 4 sec Ave. acceleration – 2.4 kph/sec2 Time passing vehicle occupies left lane – 9 sec Distance between passing vehicle at the end of its maneuver and opposing vehicle – 80 mIf 5473 vehicles passes a certain lane of road with an average speed of 60kph. determine the appropriate spacing of the vehicles.
- 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.for the utility in problem 8-3, will the utility pole be located too close to the road if it is on the outside of a horizontal curve with a radius of 2,000 f?Compute the minimum passing sight distance for the following data: Speed of the passing car = 96 kphSpeed of the overtaken vehicle = 80 kphTime of initial maneuver = 4 secsAverage acceleration = 2.4 kph/secTime passing vehicle occupies the left lane = 9 secsTime the passing vehicle meets the vehicle originally occupying the left lane = 6 sec
- 2. In a 500 m section of highway, there are 10 vehicles observed. The timeheadway is 4 sec. Determine the space mean speed of the vehicles in kph. (5pts)A stopping sight distance of 180m is available for placement of a warning sign of an impendinghazard ahead on a road designed for 100km/hr The road is situated outside a rural town in theWestern Cape and is surfaced with asphalt at a longitudinal slope of -2.5% toward the hazard.Accidents are being regularly reported on this section of road in the winter months. If a brakeand perception time of 1.7 seconds is assumed, use the table below and evaluate the SSDcondition. Motivate all the assumptions made in your calculations.4. A car is traveling downhill on a suburban road with a grade of 4% at a speed of 35 mph. Determine the required stopping sight distance.
- The critical gap (in seconds) increases as the lane widths of the major road increases. a. True b. FalseQ-3 A_ A vehicle traveled from city A to city B With average speed 120 km/hr, In the same time another vehicle traveled from city B to city A With average speed 90 km/hr,where and when the two vehicle will be connect if the distance between A and B 200 Km?Calculate the minimum passing sight distance required for a two-lane lural roadway that hasposted speed limit of 45 mi/h. The local traffic engineer conducted a speed study of the subjectroad found the following: a) Agerage speed of the paassing vehicle was 47 mi/h with an average accleration of 1.43mi/h/second, and average speed of impeder vehicles was 40 mi/h.