Question 1A traffic study at location A gave the following data in Table Q1.Table Q1: Speed and density dataSpeed (km/h)5203040Density (veh/km)15012010070a) Derive the Greenshields model for the data in table QI.Find the maximum flow.b)c) Density for a speed of 45 km/h.

Question 1 A traffic study at location A gave the following data in Table Q1. Table Q1: Speed and density data Speed (km/h) 5 20 30 40 Density (veh/km) 150 120 100 70 model for the data in table Q1. a) Derive the Greenshields Find the maximum flow. b) c) Density for a speed of 45 km/h.

Question 1 A traffic study at location A gave the following data in Table Q1. Table Q1: Speed and density data Speed (km/h) 5 20 30 40 Density (veh/km) 150 120 100 70 model for the data in table Q1. a) Derive the Greenshields Find the maximum flow. b) c) Density for a speed of 45 km/h.

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: Q2. The data shown below were obtained on a highway. Determine the parameters for Greenshield's…

Q: A section of a freeway has a speed-density relationship as following: If density 30 then assuming a…

A: Given: Speed (mile/hr) 45 60 Density (veh/hr) 90 60

Q: A data collection study found a linear speed - density relationship for a highway as follows u/65…

A: Speed: In terms of traffic, speed is defined as the distance covered per unit of time. If speed is…

Q: 6. Using the follo a model for speed 'S 68-0.59D,' calculate and / or complete the following: ( ) a.…

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

Q: 99 Under Nath

A: Given:- optimum density for the high-speed freeway data set is assumed to be 40 miles per hour and…

Q: 3(a) A section of a highway highway has a speed-flow relationship of the form: q = av² + bv. It is…

A: i) speed when flow is 1400 veh/hr is V= 78.98 Km/hr ( uncongested condition) V= 17.01…

Q: If the model in us = In uf-k/kj is applicable to depict the correlation between speed (mi/h) and…

Q: Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1,200 ft…

Q: A Greenberg’s model was developed based on data collected from a roadway. The following values are…

A: To determine the maximum flow for given traffic stream. Given, Jam density (Dj) = 130 veh/mi Mean…

Q: The Greenberg model outlines the connection between traffic stream density and space mean speed. If…

A: The Greenberg model outlines the connection between traffic stream density and space mean speed.If…

Q: Question 3: (a) A section of highway is known to have a free-flow speed of 95 km/h and a capacity of…

A: Given, Free flow speed (uf) = 95 kmph Capacity (qc) = 3300 vph Passing Time (t) = 1.6 sec/veh

Q: B During a traffic speed survey, the following observations were recorded when a vehicle passes a 50…

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: A construction zone on a highway has a posted speed of 40 kmph. The speeds of vehicles passing…

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: The average speed of vehicles on an expressway is being studied. a. Suppose observation on 50…

A: Given,n=50sample mean, x¯=65 km/hrstandard deviation, σ=6 km/hrto determine,the two-sided 99%…

Q: A researcher was positioned at the side of a 2-lane rural highway. He recorded the volume of…

A: To ascertain the quantity, movements, and types of road vehicles at a certain site, traffic volume…

Q: Traffic on a three-lane (in each direction) freeway observes the following Greenshields flow…

A: Freeway traffic flow is a complicated phenomenon that is impacted by a number of variables,…

Q: A section of highway has a speed-flow relationship of the form "q = au^2 + bu" It is known that at…

Q: A road has a capacity of 2597 veh/hr, and a free-flow speed of 61 mi/hr. Assuming Greenshield's…

A: Road capacity(qmax)=2597veh/hrFree flow speed (vf)=61mi/hrdensity(k)=72veh/mi=72 veh/mispeed(v)=?

Q: The following data was collected from a lane when the highway was operating at capacity. Spot…

A: As per the terms and conditions of the Bartleby we are supposed to answer only 3 subparts, please…

Q: From a point beside a road, a one way traffic stream is observed to consist of - A stream of cars…

A: The velocity of the car is vc=90 kmph The time headway for the car is hc=10 s. The velocity of the…

Q: Consider only a single lane of a highway. Based on extensive data from an urban freeway it is…

A: single lane highwayfreee-flow speeds are represented by normal distribution…

Q: Suppose you are noticing traffic in a single lane of an expressway at a particular area. The average…

A: Average headway (time gap between two successive vehicles) = 4.2 seconds Average spacing (distance…

Q: A section of highway has a speed–flow relationship of the form q = au2 + bu, where q is the traffic…

Q: The spot speed data on the corridor was collected as shown in the Table below. Spot speed (mph)…

A: Spot speed of vehicle 1, Spot speed of vehicle 2, Spot speed of vehicle 3, Spot speed of vehicle 4,…

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

A: Given data- One-lane one-way homogeneous traffic stream, The observed average headway = 3.0 s, To…

Q: Assume that the speed-density function of a section of highway follows Greenshield's Model. The…

Q: On a segment of A1 motorway in Casablanca, Morocco, traffic flow data was collected. The measured…

Q: 1. Assume you are observing traffic in a single lane of a highway at a specific location. You…

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

Q: A student measured the traffic volume of a rural primary road for five hours on a Wednesday for a…

A: Expand the volume using hourly expansion factors:Example:7:00-8:00V1=200×29.00=5800 vhday Time…

Q: ecause the new travel time rate (TTR) from Iditional traffic (e.g., 300vph) exceeds the r ceptable…

A: Given:- local standard=2.0 min/mile additional traffic=300vph minimum acceptable local standard =2.0…

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: Calculate the estimated free flow speed of a Class II two-lane highway if the field measured mean…

A: Given: The mean speed is 56.5 mph. The flow rate is 650 vph.

Q: The data shown below were obtained by time-lapse photography on a highway. Use regression analysis…

Q: We know that q=ku for traffic flow. If we measure speeds and densities at three points within a mile…

A: 6) If we consider 3 points within a mile of a road then we will find that if at a certain point u is…

Q: Question 2 If the model in us = ln uf-k/kj is applicable to depict the correlation between speed…

Q: The table below shows data on speed and corresponding densities on a section of a collector road. It…

A: To develop an appropriate relationship between the flow and density let use regression analysis as…

Q: 1. A study of speed-flow-density relationships at a particular site has resulted in the following…

Q: 6. (a) Define the peak hour factor (PHF) (b) Explain the traffic condition when PHF=1.

A: 6 a. Peak Hour factor : PHF Peak Hour Factor is the ratio of hourly volume during highest or…

Q: a) Among speed, flow, and density, which value helps to define the flow condition better? Why? k b)…

A: We can derive capacity from free flow speed and jam density by understanding that traffic flow (q)…

Question

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

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

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

QUESTION 10 One lane of a uniform section of highway has an optimum density of 70 vehicles per mile and an optimum speed of 35 miles per hour. Calculate the free flow speed (mph).
7. The following table shows traffic flow data collected at the main road in an urban area, in two successive days during the peak period Day one Flow (veh) Day two Time Flow (veh) 7:30 – 7:45 7:45 – 8:00 900 950 960 8:00 – 8:15 1010 1015 8:15 – 8:30 990 980 (a) Determine the peak hour factor (PHF) (b) Estimate the missing traffic flow count (x) on day two.
Question 25 Given a free flow speed of 70 mph, and an analysis volume (or flow rate) of 1,942 passenger car/hour/lane on a freeway, what is the density in passenger car/hour/lane? (please compute an exact answer)
From data collected on a metropolitan arterial road, it has been found that speed (v in kph) and density (k in vpk) are related by the following expression: v=72 0.72k Plot the speed-density diagram. Write the equation of the plot on this diagram and show the values of free-flow speed, critical speed, critical density and jam density on this diagram. Plot the flow-density diagram. Write the equation of the plot on this diagram and show the values of free-flow speed, critical speed, critical density, jam density and capacity on this diagram. Plot the speed-flow diagram. Write the equation of the plot on this diagram and show the values of free-flow speed, critical speed and capacity on this diagram.
Make a cumulative vehicle diagram and queue accumulation polygon based on the following field data collected from an approach at a signalized intersection, namely: 1. Cycle length = 72 seconds 2. Red interval = 30 seconds 3. Green interval = 42 seconds 4. Vehicle arival flow = 900 vehicles/hour %3D %3D 5. Saturation flow rate = 1800 vehicles/hour 6. Vehicle departures every 2 seconds
4. The relation of the density (d) along a roadway to vehicle speed (s: km/h) is given as d = 50- s/2 Determine the flow (q)-speed (s) and flow (q)-density (d) relationships and draw the variations of density-speed, flow-speed and flow-density on. Show the maximum and minimum points on these graphs
Question: A section of highway is known to have a free-flow speed of 55 mph and a capacity of 3300 veh/hr. In a given hour, 2100 vehicles were counted at a specified point along this highway section under uncongested conditions. If the linear speed- density relationship applies, what would you estimate the space-mean speed of these 2100 vehicles to be? Show all the calculation steps.
HW 1. At a given location, the space mean speed is measured as 40 mi/h and the rate of flow as 1,600 pc/h/ln. What is the density at this location for the analysis period?
Assume that the speed-density function of a section of a highway follows the Greenshields model. The free-flow speed is 75 mph and the jam density is 176 veh/mi/In. Derive V as a function of S. In 15 minutes, you have counted that V = 150 veh/15-minute/In. Estimate the two possible speeds S (in mph) during this 15-minute period.
Given a freeway flow study at a certain highway. The speed- density relationship is described in the givenequation or relationship: V s = 58- 0.40k Determine the following:a. Free-flow speed and jam densityb. Derive the equation describing flow and speed.c. Derive the equation describing flow and density.d. Determine the capacity of highway
The primary elements of traffic flow are flow, density, and speed. Discuss with illustration the relationships between the three elements of a traffic flow.
F] Vehicles travel at constant speeds on a one-lane one-way street between sections X and Y. An observer located at point X observes the four vehicles passing point X during a period of 10 seconds. The speeds of the vehicles are measured as 45, 45, 40, and 30mph, respectively. Calculate the average flow, density, time mean speed, and space mean speed.