Problem 3 [5 pts] A section of the freeway has the following flow-density relationship. What is the jam density (k;) (in vpm)? u = 40 In 1 (300) where u = space-mean speed in mph, k = density in vpm
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Please explain step by step and include any formula used
![Problem 3 [5 pts]
A section of the freeway has the following flow-density relationship. What is the jam density (k;) (in
vpm)?
u = 40 In
1 (300)
where u = space-mean speed in mph, k = density in vpm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F553c03f6-c199-4870-a061-8ddf7adde455%2F9dd46c2c-193a-435b-bab5-3b09fdb22d0c%2F09sct8s_processed.jpeg&w=3840&q=75)
Step by step
Solved in 2 steps with 3 images
- Please explain step by step and include any formular usedA freeway study resulted in a speed-density relationship: v=60(1-0.008k). Determine: a. The free-flow speed. b. The jam density. c. The speed-flow relationship. d. The flow-density relationship. e. The critical density. f. The capacity.Please explain step by step and show all the formula used
- Explain step by step, show what formulas usedConsider the geometric and traffic characteristics shown below. Approach (Width) Peak hour Approach Volumes: Left Turn Through Movement Right Turn Conflicting Pedestrian Volumes PHF For the following saturation flows: North (56 ft) South (56 ft) East (68 ft) West (68 ft) 165 105 200 166 442 395 585 538 162 157 191 200 900 1,200 1,200 900 0.95 0.95 0.95 0.95 Through lanes: 1,600 veh/h/in Through-right lanes: 1,400 veh/h/in Left lanes: 1,000 veh/h/in Left-through lanes: 1,200 veh/h/in Left-through-right lanes: 1,100 veh/h/in The total cycle length was 277 s. Now assume the saturation flow rates are 10% higher, that is, assume the following saturation flow rates: Through lanes: Through-right lanes: Left lanes: Left-through lanes: Left-through-right lanes: 1,760 veh/h/in 1,540 veh/h/in 1,100 veh/h/in 1,320 veh/h/in 1,210 veh/h/in Determine a suitable signal phasing system and phase lengths (in s) for the intersection using the Webster method. (Enter the sum of green and yellow times for…5- A basic freeway has 3 lanes in each direction and is on flat terrain. It has a jam density of 190 veh/km and a capacity of 4750 veh/h. The spot speed of 5 cars was collected at the midpoint of a 3.4 km segment of this freeway. Vehicle Speed (km/hr) 1 86 2 89 3 95 4 5 99 100 a) Calculate the space mean speed b) Calculate the free flow speed based on the given information c) A directional weekday peak-hour volume of 4640 vehicles is observed, with 1320 vehicles arriving in the most congested 15-min period. If the traffic stream has 12% large trucks and buses determine the level of service 6- What are the steps that a 4-step model used to predict travel demand on roads network consists of? Briefly describe was sort of information each step provides? 7- The bitumen is a conventional bituminous binder has a penetration index of -1 and = 65°c. T800 pen a) Determine the stiffness modulus of this bitumen if the operating conditions are as follows: temperature of 25°c and loading time of…
- please Explain step by step and include any formular used1- A study of freeway flow at a particular site has resulted in a calibrated speed-density relationship, as follows u = 57.5(10.008k) a) Find the free-flow speed and jam density b) Derive the equations describing flow versus speed and flow versus density c) Determine the capacity of the road 2- A rural freeway has a demand volume of 6750 v/hr. It has four 3.4 m lanes in each direction. The traffic stream is comprised of 8% heavy vehicles and a PHF of 0.94. The terrain is rolling throughout the segment. What is the level of service for the facility? What is the capacity? 3- For an urban freeway, how many 3.6 m lanes in each direction are needed to achieve LOS C on a freeway with a peak hour traffic volume of 5725 v/hr and with a PHF = 0.967 The traffic stream is comprised of 11% heavy vehicles and the location is level terrain.