: The data shown below were obtained on a highway determine the value of "a" and "b" given the formula for Greenshield's Model. Also determine the maximum capacity and the jam density, optimum speed and density density, vpkm speed, kph 50 18 45 25 40 41 34 58 22 71 13 88 12 98 10 105 9. 110 8 125 5 135

: The data shown below were obtained on a highway determine the value of "a" and "b" given the formula for Greenshield's Model. Also determine the maximum capacity and the jam density, optimum speed and density density, vpkm speed, kph 50 18 45 25 40 41 34 58 22 71 13 88 12 98 10 105 9. 110 8 125 5 135

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

1.) From the traffic studies performed along a street shows the distances each vehicle traveled every 3 seconds on a portion of the highway. Vehicle Distance, m 1 82.6 2 89.9 3 84.6 4 82 a.compute the space mean speed of the traffic, in kph.b.compute the flow of traffic.c.compute the density of traffic.
Assuming that the expression: u = ue i, can be used to describe the speed-density relationship of a highway, determine the capacity of the highway from the data below using regression analysis. k (veh/mi) u, (mi/h) 43 50 38.4 33.8 53.2 42.3 31 Under what flow conditions is the above model valid?
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
The speed-density relationship of a highway is given as u= 100 -0.5k where, u = speed in km per hour, k = density in vehicles per km. The maximum flow (in vehicles per hour, round off to the nearest integer is)
On a specific westbound section of a highway, studies show that the speed density relationship is 4.5 u = uf |1 It is known that the capacity is 4500vph and the jam density is 270 veh/km. Speed when the density is 150 veh/km O 23.58 O 27.64 O 25.42 O 26.81
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
Use the below data to find speed at capacity Density, k (veh/mi) x, Speed, u, (mi/h) y 53.2 48.1 44.8 40.1 37.3 35.2 34.1 27.2 20.4 17.5 146 13.1 112 8.0 Answer: 28.914 ARRICASIRENSE 115
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).
Measurements from a single-lane roadway reveal that the average spacing and headway between passing vehicles are 200 ft and 2.4 seconds, respectively. What is the flow [veh/hr], density [veh/mi] and average speed [mi/hr] of traffic on this roadway?
Car A is moving with constant speed v on the straight and level highway. The police officer in the stationary car Pattempts to measure the speed v with radar. If the radar measures "line-of sight" velocity, what velocity v' will the officer observe? Evaluate your general expression for the values v = 78 mi/hr, L= 480 ft, and D = 17 ft, and draw any appropriate conclusions. O Answer: v' = L P mi/hr
c) Greenshields proposed a linear relationship between speed and density. Using this relationship, it was noted that on a length of highway the free speed Vi was 100km/h and the jam density Df was 90 veh/km. i) What is the maximum flow which could be expected on this highway? ii) At what speed would it occur?