Spot speed study has been carried out on a highway and collected data is shown in the table below. Speed range (kmph) No. of vehicles observed 0-10 10 10-20 13 20-30 15 30-40 12 40-50 16 Determine the design speed for checking the geometric design of the highway.
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- Data obtained from aerial photography showed 8 vehicles on a 356 m-long section of road. Traffic data collected at the same time indicated an average time headway of 4.8 sec. Determine the space mean speed in km/hr to one decimal place in accuracyThe speeds of 10 vehicles were measured at the midpoint of a (4.04-kilometer section of roadway. Vehicles The speeds of 10 vehicles were recorded: Assuming all vehicles were traveling at constant speed over this roadway section, calculate: a. Time-mean speed in kph b. Space-mean speed in kph c. Traffic Density in veh/km 1st 2nd 3rd 4th 5th Speed (kph) 42.3 54.2 68.8 35.8 48.6 Vehicles 6th 7th 8th 9th 10th Speed (kph) 78.5 96.1 41.5 28.4 36.2Find Pace for data shown in table below which below represents speed spot study (SSS) data that recorded from urban collector highway in Tikrit city. E No. 1234 5 6 789 Speed group (mph) 20-25 25-30 30-35 35-40 40-45 45 - 50 50-55 55 - 60 60-65 Frequency (f) 0 4 13 28 41 37 22 9 0
- Spot speed studies were carried out at a certain stretch of a highway with mixed traffic. The upper speed limit for regulation and speed to check geometric design element in percentile speed is 98th and 15th 85th and 98th 85th and 15th 98th and 85thSpot speed study was carried out redesign the stretch of major district road. The data collected during th estudy is given below. (1) (ii) Speed Range kmph 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 Frequency of vehicles Cars Two Wheelers 5 20 24 20 30 35 25 10 10 1 0 6 12 30 60 35 35 15 18 9 What is the design speed for redesigning existing MDR? What are upper and lowe speed limits for mixed traffic? Others 0 4 4 5 30 30 15 10 2 0Spot speed studies were carried out at a certain stretch of a highway with mixed traffic. The upper speed limit for regulation and speed to check geometric design element in percentile speed is 85th and 15th 85th and 98th 98th and 85th 98th and 15th Next
- Q1/ b) During measurement in spot speed study, a total of 1000 vehicles were observed. 85 per centile and 15 percentile speeds were obtained as 40 kmph and 10 kmph respectively. Find the number of vehicles moving between speeds of 10 kmph and 40 kmph.The following speeds (75 80, 72, 77 - 79,87,69 and 65) in km/her were measured utes. The data. space mean for vehicle.com speed for This ·computesThe stopping sight distance (SSD) for a level highway is 140 m for the design speed of 90 km/h. The acceleration due to gravity and deceleration rate are 9.81 m/s² and 3,5 m/s², respectively. The perception/reaction time (in s, round off to two decimal places) used in the SSD calculation is
- The average speed per lane of a vehicle of an expressway is 65 kph. The average length of cars moving on that lane is 5.35 m. The perception, identification, emotion and volition time is 1.2 second What is the required center to center spacing of vehicles in meter? a.26.97 b. 23.65 c. 19.00 d. 29.16 The traffic density in vehicles per kilometer is equal to a.32.44 b. 37.08 c. 29.82 d. 26.97 Calculate the minimum time headway per vehicle in seconds? a.1.12 b. 2.23 c. 1.34 d. 1.62The Table below shows the data collected on a urban highway in Accra during a speed study. Develop the frequency histogram and the frequency distribution of the data and determine: i. The arithmetic mean speed ii. The standard deviation The median speed The mode or modal speed iii. iv. The 85th-percentile speed v. ** use the intervals of 34 - 35.9, 36– 37.9, 38– 39.9 and so on.... Speed (km/h) Speed (km/h) Car Speed (km/h) Car Car Car Speed (km/h) No. No. No. No. 35.1 46.1 56.0 23 24 45 47.8 67 44.0 54.2 46 47.1 68 49.1 45.8 25 52.3 47 34.8 69 49.2 44.3 26 57.3 48 52.4 70 56.4 36.3 27 46.8 49 49.1 37.1 71 48.5 57.8 36.8 45.4 48.6 6 54.0 28 50 72 42.1 29 51 65.0 73 8. 50.1 30 55.8 52 49.5 74 52.0 51.8 50.8 9 31 43.3 53 52.2 75 49.8 10 32 55.3 54 48.4 76 63.4 11 38.3 33 39.0 55 42.8 77 60.1 12 44.6 34 53.7 56 49.5 78 488 13 45.2 35 40,8 57 48.6 79 52.1 14 41.1 36 54.5 58 41.2 80 48.7 15 35.1 37 51.6 59 48.0 81 61.8 16 50.2 38 51.7 60 58.0 82 56.6 17 54.3 39 50.3 61 49.0 83 48.2 18 45.4…5. Vehicle time headways and spacings were measured at a point along a highway, from a single lane over the course of an hour. The average values were calculated as 2.5 sec/veh for headway and 200 ft/veh for spacing. What was the average speed? [54.4 mph]