The speed-density relationship in a mid-block section of a highway follows the Greenshield's model. If the freeflow speed is V, and the jam density is k, the maximum flow observed on this section is(b) v,k,(d) V.kv,k(c) Vik

Given data: The free flow speed is Vf The jam density is kj

The speed-density relationship in a mid-block section of a highway follows the Greenshield's model. If the flow speed is V, and the jam density is k, the maximum flow observed on this section is (a) Vik (b) v k (d)

The speed-density relationship in a mid-block section of a highway follows the Greenshield's model. If the flow speed is V, and the jam density is k, the maximum flow observed on this section is (a) Vik (b) v k (d)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: 7.11 A four-lane highway has a free-flow speed of 100 km/h and the flow-density relationship shown…

Q: HW 3. A study of freeway flow at a particular site has resulted in a calibrated speed- density…

A: Given: S=32×2.5-0.02D) To find: The free flow speed Jam density The speed flow relationship The…

Q: 4. An engineer has the following data for a highway segment u (mph) 70 65 58 53 47 42 44 38 32 29 20…

Q: In a one-lane one-way homogeneous traffic stream, the observed average headway is 3.0s. The flow…

A: Given data: In a one-lane one-way homogenous traffic stream, The observed average headway, Ht=3 s

Q: .) A study of freeway flow at a particular site has resulted in a calibrated speed- density…

A: NOTE: AS per guidelines I am solving question first repost the 2nd question The speed density…

Q: er jam condition as 7.0 m. The speed-f given by: k and q = Uxk k. U = Ug1- %3D sf where, U =…

Q: A speed-density study has resulted in the following relationship (S = 55.0 -0.45 D) Find: Free Flow…

Q: Topic: Transportation engineering Free-flow speed of a lane of a road is 120 km/h and the jam…

Q: Question 2. The capacity of a lane of a highway is 1200 veh/h and the free flow speed at the…

A: Given: Capacity of a lane highwat=1200 veh/h Free flow speed= 60mph

Q: On a specific highway, the speed-density relationship follows the greenberg's model. The free flow…

A: Given- Free flow velocity=80 km/hr, Jam density kj=200 vehicles/km,

Q: Traffic on a single-lane urban street observes the following flow-density relationship:…

A: Answer We know from Greenshield's linear speed density model q = u*k q = uf*k*(1-kkj) q = capacity u…

Q: QUESTION 3 a) Given that the relationship between speed and density obtained from actual data on a…

Q: An accident occurs on a one-lane highway and blocks off all lanes of traffic. This freeway has a jam…

Q: On a highway the free mean speed was 75 kmph and centre to centre spacing between vehicles at jam…

A: Free mean speed = 75 kmphThe space headway at jam density = 6.25 mTo find:The maximum flow density.

Q: Ex pie study of freeway flow at a particular site has resulted in a calibrate speed- density…

A: The speed density relationship is given as, V =57.51-0.008D= 57.5-0.46D Where v is the speed and D…

Q: mas relationship as follows: V = 57.5(1 - 0.008 K) For this relationship, determine: (a) the…

A: Solution : (a) To solve for Free Flow speed. us=57.5-0.46k. ( this equation is linear with respect…

Q: A local arterial has an average flow of 1500 vph. At 8:20 AM, a school bus stopped at a local stop…

A: Given data: Average flow, q=1500 Vph Average spacing=8 meters Traffic capacity, qm=1800 Vph Using…

Q: A highway section has an average spacing of 7.62m under jam conditions and a free-flow speed of…

A: Jam Density: The maximum density of traffic in a traffic jam is known as Jam Density. The flow is…

Q: Given a Greenshields linear density-speed relationship of us = 71.2 - 0.584k a. derive the…

A: Density - speed relationship Us = 71.2 - 0.584K Determinea. Flow-speed relationship. b. Flow-density…

Q: The free flow speed of a portion of the highway is 55 mph and a jam density of 95 veh/mile. Use…

A: From the greenshields modelMaximum discharge is given by:Qmax=Vfkjam2Qmax=55mph95vm2Qmax=1306.25vhr

Q: The free flow speed of a portion of the highway is 60 mph and a jam density of 100 veh/mile. Use…

A: Option (a) 30 mph is correct.

Q: 2(a) c) The average length of each vehicle in a traffic stream is 7.0M, and the average distance…

A: Jam density = 111.11 vehicles/kmSpeed at Max flow = 43.24 km/hrExplanation:

Q: A speed-density study has resulted in the relationship S=57.5(1 -0.008 D) Find: Free Flow Speed…

Q: Question 1. The free mean speed on a roadway is found to be 80 kmph. Under stopped condition, the…

A: Given- Free mean speed Vf=80 kmph, Spacing s=6.9 m,

Q: (a) The following relationship between traffic speed and flow applies to a particular urban…

Q: 3(b) Another section of the highway has the Following Flow density relationship: q = 50k - 0.156 k²;…

A: 1) 4006.41 2) 25 3) 21.47Explanation:Step 1:Step 2:

Q: A freeway traffic stream was observed to have a density of 22.0 veh/mi/ln when the mean speed was…

A: The objective of the question is to calculate the flow rate of traffic at a given mean speed and…

Q: Based on a linear speed-density model, with a jam density of 120 vpmpl and a free flow speed of 60…

Q: B. A section in SCTEX has a flow density relationship of q = 75k - 2.7k? where q is the flow and k…

Q: way sp the Greenshields model, and use it to determine: The mean free flow speed The jam density b.…

Q: By assuming linear speed-density relationship, the jam density on a highway facility is observed to…

A: Given, Jam Density = 150 veh/km mean free speed = 50 kmph

Q: 4. C per The maximum flow rate on a road is 1000 vehicles hour and the free flow speed is 80 km/h.…

A: (i) The two possible speeds are 2424 km/h and 5656 km/h. (ii) The two possible spacings are 1/700…

Q: Based on a linear speed-density model, with a jam density of 120 vpmpl and a free flow speed of 60…

A: Given data in question Jam density (Kj) = 120 vpmplFree flow speed (Vsf) = 60 mphSpeed (Vs) = 50…

Q: A freeway traffic stream was observed to have a density of 22.0 veh/mi/ln when the mean speed was…

A: The macroscopic stream model illustrates the relationship between one parameter of traffic flow and…

Q: 2. The upstream traffic flow on a road with two lanes in the relevant direction is q₁= 1800 veh/hr…

A: Traffic flow, q1= 1800 veh/hrFree flow speed, V1 = 90 km/hrreduced flow, q2 = 900 veh/hrqueue…

Q: the road stretch (in vehicles/h) is

A: Given data, Average free flow speed,V=60 km/hJam density on a road, ρj=120 vehicles/kmFor a linear…

Q: c) Greenshields proposed a linear relationship between speed and density. Using this relationship,…

A: Given data, Free speed Vf = 100 km/hr Jam density Df = 90 veh/km

Concept explainers

Capacity and Level of Service at Intersections

The term capacity is associated with transportation engineering. Capacity helps to understand how many pedestrians or vehicles can be handled by a transport facility. Level of service is also a term associated with transportation engineering. The level of service indicates the performance of the transport facility.

Question

The speed-density relationship in a mid-block section of a highway follows the Greenshield's model. If the free
flow speed is V, and the jam density is k, the maximum flow observed on this section is
(b) v,k,
(d) V.k
v,k
(c) Vik

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Capacity and level of service at intersections

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

3(b) Another section of the highway has the Following Flow density relationship: q = 50k - 0.156 k²; H q= (v) 2M2 at bas Determine: 9977 Fa (i) the maximum flow (qmax) of the highway Section? (0) Lii) the speed at maximum flow? booge wolf - A 14 (1) Ciii) the density (K) when the highway is at one-quarter of its capacity?
HW 3. A study of freeway flow at a particular site has resulted in a calibrated speed- density relationship as follows: For this relationship, determine: (a) the free-flow speed, (b) jam density, (c) the speed-flow relationship, (d) the flow-density relationship, and (e) capacity. S=32 *(2.5 -0.02 D)
In a one-lane one-way homogeneous traffic stream, the observed average headway is 3.0s. The flow (expressed in vehicles/hr) in this traffic stream is 2 X
(b) The density-speed relationship for a freeway lane was found to be: u = 54.5 – 0.24k Determine: Speed at capacity. Density at capacity. (i) (ii) (iii) (iv) Maximum flow. Sketch the u-q, q-k and u-k curves for this stream flow equation.
Expicy study of freeway flow at a particular site has resulted in a calibrate speed- density relationship as follows:- V= 57.5(1-0.008 D) For this relationship, determine: a) The free-flow speed and jam density b) The speed- flow relationship and the flow-density relationship c) The capacity of the site mathematically
The free flow speed of a portion of the highway is 60 mph and a jam density of 100 veh/mile. Use Greenshield Model. Compute the speed in mph when flow is maximum 30 O 7.75 O 15 O 120
4. An engineer has the following data for a highway segment u (mph) 70 65 58 53 47 42 44 38 32 29 20 k (veh/mi) 15 34 47 62 78 89 94 103 109 134 153 a. Applying Greenshields' assumptions, estimate the mean free speed and jam density. b. What are the maximum flow and the corresponding density? What are average headway and spacing when k=50veh/mi d. Assume each speed is an individual vehicle, traveling over a 4 mile segment. Calculate С. i. Time mean speed ii. Space mean speed
Using differential equation of gradually varied flow, show that dy/dx is positive for S1 M1 and M3 flow profile?
A speed-density study has resulted in the relationship S=57.5(1 -0.008 D) Find: Free Flow Speed (FFS), Jam Density and Capacity.
H.engg
A freeway traffic stream was observed to have a density of 22.0 veh/mi/ln when the mean speed was 55.0 mi/h. On another occasion at the same location, the jam density was found to be 132 veh/mi/ln. Assume Greenshields' model of traffic flow applies. The optimum speed (in mi/h) is: a) 22.0 b) 33.0 c) 55.0 d) 66.0 e) None of he above
By assuming a linear speed-density relationship, the mean free flow speed in a highway lane equals 55 mph, and the jam density is observed to be 170 vpm. a. Plot the q-k-u curves (3 curves). b. Write down the speed-density and flow-density equations. c. Compute the maximum flow. d. Compute speeds and densities corresponding to a flow of 900 vph. e. Calculate average headway, gaps, clearance, and spacing at maximum flow and at jam density.