Compute the required safe stopping sight distance for a two way traffic in a single lane to avoid collision with a car approaching from the opposite direction if both cars are moving at a speed of 80 kph. Total perception-reaction time of the driver is 2 sec. Coefficient of friction between the tires and the pavement is 0.50. Slope of roadway is +2%.
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- 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.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.A horizontal curve with a radius of 800 ft connects the tangents of a two-lane Highway that has a posted speed limit of 35 mi/h. If the highway curve is not super elevated, e =0, determine the horizontal sightline offset (HSO) that a large billboard can be placed from the centerline of the inside lane of the curve, without reducing the required SSD. Perception-reaction time is 2.5 sec, and f = 0.35. when S<L and S>L.
- 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 = 4 sec Average acceleration = 2.4 m/sec2 Time the passing vehicle occupies the left lane = 9sec Distance between the passing vehicle at end of its maneuver and the opposing vehicle = 80m(TRAFFIC AND HIGHWAY ENGINEERING) A tall building is located 13.5 m from the centerline of the right lane of a local road and 19.5 m from the centerline of the right lane of an intersecting road in figure below. If the maximum speed limit on the intersecting road is 56 km/h, what should the speed limit on the local road be such that the minimum sight distance is provided to allow the drivers of approaching vehicles to avoid imminent collision by adjusting their speeds? Approach grades are 2 percent.Determine the ideal velocity of a car that could pass round a 5° curve if the impact factor is 0.14. Neglect friction. a. 48.51 kphb. 35.62 kphc. 63.87 kphd. 86.51 kph
- Compute 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 a cars initial velocity is 15 m/s to the right, locate the position of the car after 12s if its deceleration is 1.5m/s^2 and its initial position is 0mA driver is traveling at 80 kph on a wet road. An object is spotted on the road 125 m ahead and the driver is able to come to a stop just before hitting the object. Assuming standard perception/reaction time, determine the grade of the road.
- On the 6% graded section of a highway, designed with a velocity of 90 km/h, traffic flow is allowed discontinously due to maintenance and repair works. The drivers have to be warned while approaching this section. Find the distance that traffic signs have to be placed on each side of the working area.Given: Pavement sliding coefficient, f=0,45 detection-reaction time, tr=0,75 snA driver travelling at 50mph sees a hazard at a certain distance ahead. The driver then applies the brakes immediately, time is 2sec and begins slowing the vehicle at 10m/s^2. If the distance from the stopping point to avoid hitting the boulder is 10.28m, how far the car from the hazard upon perception.Determine the required total passing sight distance for the following: Speed of the passing car = 100 kph; Speed of the overtaken vehicle = 80 kph; Time of initial maneuvers = 5 sec; Time passing vehicle occupies left lane = 10 secs; Distance between the passing car and opposing car at the end of maneuver = 20 m; Average acceleration = 2.5 kph/sec. a. 502.75 m b. 602.75 m c. 702.75 m d. 402.75 m