PROBLEM 6: Four vehicles passing through the SLEX has the following observation. Determine the time mean speed. Vehicles Time of passing (sec) | Spot speed (kph) 1 1.5 55.4 2 6.0 56.8 3 8.0 53.6 4 12.00 48.9
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- On a four legs rotary intersection, the width of both crossed urban streets is equal to 10.0m in each direction. Assume the central island circumference equals 157m, and a circulating width equals 12.0m. Calculate the control delay (seconds) using the Jordanian empirical method based on the following peak hour traffic volumes: Leg U-Turn L-Turn Through R-Turn EB 145 172 1056 409 WB 132 285 1793 462 NB 56 120 476 192 SB 96 149 582 221 • Round your answer to the nearest two decimal places. Answer: 14.332There are 5 vehicles passing a certain point on the observation road in a period of 20 seconds. It is required to determine the density of traffic of roadway with the given spot speeds Vehicle Time of passing spot speed 34.2kph 1.62 sec 2 6.16 42.4 8.60 46.3 4 13.07 41.1 15.77 43.46. There are 5 vehicles passing through an intersection of two highway in a period of 20 seconds. Vehicle Spot speeds, kph 1 34.20 42.40 46.30 41.10 4 5. 43.40 Compute the space mean speed in kph. 41.05 kph
- Observers stationed at two sections XX and YY, 1000 ft apart on a highway, record the arrival times of four vehicles as shown in the table below. Vehicle Section XX Section YY A T0 T0 + 14.33 sec B T0 + 3.76 sec T0 + 18.14 sec C T0 + 7.94 sec T0 + 22.06 sec D T0 + 12.13 sec T0 + 27.87 sec If the total time of observation at XX was 20 sec, determine (a) the time mean speed, (b) the space mean speed, (c) the flow at section XX, and (d) the density on the highwayObservation post reveals that 5 vehicles passed through at intervals of 8 s, 9 s, 10 s, 11 s, and 13 s, respectively. The speeds of the vehicles were 80 kph, 76 kph, 70 kph, 80 kph, and 50 kph, respectively. Compute the time mean speed. 71.2 kph b. Compute the space mean speed if the distance traveled by the vehicles is 250 m. 88.24kph If the density of traffic is 20 vpk, compute the rate of flow of traffic in vph. 1765vph 5. a. c.A subway train travels between two of its station stops with the acceleration schedule shown. (a) Determine the velocity after 14 sec in m/s. (b) Determine the time interval At, during the train brakes to a stop with a deceleration of 2 m/s? in sec. (c) Determine the distance S between the stations in m. qfm/s?} 8. 10
- 37. The speed of 5 vehicles were measured (with radar) at the midpoint of a 0.5 km section of the Bataan Provincial Expressway (BPEX). The speeds for vehicles 1, 2, 3, 4, and 5 were 44, 42, 51, 49, and 46 kph, respectively. Assuming all vehicles were traveling at constant speed over the section, calculate the time mean speed. a. 46.17 kph b. 46.40 kph C. 47.32 kph d. 39.76 kph 38. The speeds for vehicles A, B, C, D and E were 50, 54, 56, 58 and 60 kph respectively. Assuming all the vehicles were traveling at constant speed for a distance of 1.5 km, determine the space mean speed. a. 57.55 kph b. 61.32 kph c. 55.38 kph d. 69.50 kph 39. Two cars approaching each other from opposite directions at a speed of 120 kph and 90 kph respectively. Assuming a reaction time of 2 seconds and a coefficient of friction of 0.60 with a brake efficiency of 50%. Compute the minimum sight distance required to avoid a head on collision of the two cars. a. 405.222 mA car travels from A to B at an average speed of 80 kph and back to A without loss of time at an average speed of 100 kph. Determine the average speed for the entire trip. A) 9.88 kph B 9.89 kph 98.98 kph 88.89 kph E o kphThe 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 m
- A. On a six-lane EDSA, an observer is stationed at a certain spot. Alt of the cars in lane lare moving ata speed of 75 kph, 62 kph in lane 2, and 100 kph in lane 3, 65 kph in lane 4, 80 in lane 5 and 90 for the bus lane respectively. In addition, cars are kept at a constant 85-meter distance between. What will be the time-mean speed and space- mean speed for such a traffic stream based on the acquired spot speed data for all cars as they cross the observation site for 45 minutes?Based on the following traffic speed frequency table, the median and 85th percentile speeds are approximately ………. & ……….. respectively. a. 56 & 66 b. 75 & 94 c. 79 & 110 d. none e. 67 & 92Compute 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