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- Determine the approximate center to center spacing of vehicles in a certain lane if the average speed of the cars using that particular lane is 40 kph and the volume of traffic is 800 vphCompute 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 secDetermine the total stopping distance (ft) for a road with speed limit of 79mph and grade of -2.5%
- If 5473 vehicles passes a certain lane of road with an average speed of 60kph. determine the appropriate spacing of the vehicles.The equivalent hourly flow rate for an approach with 125 vehicles in the peak 15 minutes and PHF = 0.92 would be:Traffic volume is 2578 veh/hr with 687 vehicles arriving in peak 15 minutes.There are tow lanes, 12 percent trucks(30/70 split for SUT/TT), the length of the road is 1.8 miles long with a 3.5 percent grade. calculate the analysis flow rate?
- 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.Drivers must slowdown from 65mi/h to 45mi/h to negotiate a severe curve on a rural highway. A warning sign for the curve is clearly visible for a distance of 150 ft. How far in advance of the curve must the sign be located to ensure that vehicles have sufficient distance to decelerate safely? Use the standard reaction time 2.5 s and deceleration rate 11.2 ft/s recommended by AASHTOUnder what condition is a value of 0.5 assigned to the parameter K in the expression for the lane group delay calculation?
- Because of a visible obstruction along a horizontal curve drivers can only see a stop sign until they are at 250 feet upstream of the sign. Can vehicle stop before the stop line if the perception reaction time is 2.5 seconds and deceleration rate is 11.2 ft./s^2 what should be a reasonable posted speed limitfor 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?plz, solve this problem, it is not graded question. Transportation Engineering-1 During a 70 sec period, a detector is occupied by vehicles for the following times: 0.31, 0.39, 0.41, 0.35, and 0.53 sec. Estimate the values of flow (q), density (k) and speed (v). Assume that the loop detector is 10 ft and that that the average length of the vehicle is 20 ft.