(1) What is the flow when avg. speed is 50 mph? (2) A traffic study provided the # of acceptance and rejection by different gap values, shown in the Table below. What is the critical gap? Explain your answer. Hint: you can find that gap value by inspection. No calculation is needed.
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- 6-5 The data shown below were obtained on a highway. Use regression analysis to fit these data to the Greenshields model and determine (a) the mean free speed, (b) the jam density, (c) the capacity, and (d) the speed at maximum flow. Speed (mi/h) Density (veh/mi) 14.2 85 24.1 70 30.3 55 40.1 41 50.6 20 55.0 15SUBJECT: PRINCIPLES OF TRANSPORTATION ENGINEERING PROBLEM: The data shown below were obtained on a highway determine the value of "a" and "b" given the formula for Greenshield Model. Also determine the maximum capacity and the jam densityQ1 (a) i. 10,000 vehicle speed traffic data were collected during the weekday on route FT050 at Batu Pahat, Johor. Suggest how to quantify and describe the basic characteristic of this data. Then explain how the method you suggested can help others to understand the data. (4 marks) ii. Consider the following data from 11 truck speed data climbing a hilly road. Compute 5 (FIVE) basic statistics of the sample speed as following: Sample mean Median а. b. с. Variance d. Range Standard error of the mean е. Speed (km/h) 25 Truck 1 2 35 3 55 4 15 40 6. 25 7 55 8. 35 9. 45 10 11 20
- Q1) Choose the correct answer.. 1-The first stage in traffic engineering studies is.. A. Traffic volume studies B. Spot speed studies C. Speed and delay studies D. Origin and destination studies 2.For the movement of vehicles at an intersection of two roads, without any interference, the type of grade separator generally preferred to, is A. Partial Cloverleaf B. Trumpet C. Diamond Interchange D. Full Cloverleaf 3. Pick up the incorrect statement from the following.. A. The speed on urban roads 120-130 km/hr. B. There is no control on the urban roads Access. C. The urban roads are use for long distance. D. Level of service for urban roads A and B. 4. The main objective of traffic volume studies.. A. To decide priority for improvement of roads. B. For geometric design. C. For computing roadway capacity. D. To plan traffic operation. 5. The minimum space headway increases with A. Increase in length of vehicle. B. Increase in width of vehicle. C. Increase in weight of vehicle. D. Increase…Problem 6 Traffic on a single-lane urban street observes the following flow-density relationship: q=30k(1-k/180), where q is the traffic flow in vehicles per hour (VPH), and k is the traffic density in vehicles per mile (VPM). Answer the following questions: a. | Calculate the free flow speed, capacity, and jam density of the traffic flow. b. What is the minimum spacing and the minimum (time) headway of the traffic flow? What is the traffic volume when the travel speed is 20 MPH? C.10.A lane on a freeway displays the following characteristics: (a) average headway between vehicles is 1.9s, and (b) the average spacing between vehicles is 210 feet. What is the rate of flow for the lane? What is the average speed in mi/hr? 11. Define 'Crash Modification Factor (CMF)" and describe how one might be used by a transportation agency
- Calculate the minimum passing sight distance required for a two-lane rural highway that has a posted limit of 72 kph. The local traffic engineer conducted a speed study of the subject road and found the following: Average speed of passing vehicle= 76 kph Average acceleration of passing vehicle= 2.3 kph/sec Average speed of impeder vehicles= 64 kph Show complete solution. Need ASAP. Thank you.The relationship between flow and density on a four-lane highway (two lanes per direction) is known to follow GreenShiled's model, with a free flow speed of 100 km/h and a jam density of 80 veh/km/lane. One of the two lanes of the EB direction will be closed for an entire month for maintenance. The traffic demand for the highway on a typical weekday is shown in the table below. a) What is the maximum length of the queue upstream of the bottleneck during both the morning and afternoon peak hours? b) At what time will the morning and afternoon queues be dissipated? c) Draw the shock wave diagram (for the entire day) showing shock wave speeds, critical times, and distances. Time 7:00 AM - 9:00 AM 9:00 AM 3:00 PM 3:00 PM 7:00 PM 7:00 PM–11:00 PM 11:00 PM 7:00 AM Average Demand (vph) 3000 1500 3200 1200 400Traffic flow in an urban section at the intersection of two highways in the design year are given below. Appr Left turning Straight ahead Right turning oach Cars Commer Scoot Cars Comm cial ers ercial Scoot Cars Comm ers ercial Scoot ers N 200 50 100 250 100 150 150 5 50 80 E 180 60 80 220 50 120 200 40 120 S 250 80 100 150 50 90 160 70 90 W 220 50 120 180 60 100 250 60 100 The highways at present intersect at right angles and have a carriageway width of 15 m. Design a rotary intersection making suitable assumptions.
- H.w Try only ten): 1. The flow is zero on the highway only if the density equals to zero. 2. Density is the number of vehicle passing during a given width of lane of roadway. 3. If an accident occure during the way, it could be say that it is uninterreputed flow. 4. Mobility for arterial road is grater than the mobility of local road. 5. 85 th percentile of spot speed cumulative curve represents the highway speed limit. 6. One of the most important of on street parking is mechanical garage. 7. As angle of parking increase, more accidents would be occure. 8. At jam density, density of flow is zero. 9. PHF of rural region is less than the PHF in urban region. 10.Stopping time delay occure ar intersection. 11.Future traffic includes only generated and developed traffic. 12.As the tunover duration of the parking increase, operation of the parking increases also.Please show me the process and steps. A) Traffic on a highway is said to follow the Greenshields model with jam density of 196 pc/mi/ln. The measured capacity is 3250 pc/h/ln. What is the free flow speed?Choose the right answer a rural highway on a level terrain has the following traffic composition: 40 % Passenger cars 30 % trucks 20 % buses 10 % recreational vehicles Find the total volume expressed as pcu/hr. if the total volume is 6000 veh/hr. * a-7620 b-7630 c-7640