Homework Answers
Question (1)
Density is expressed in units of option(a). Vehicles per mile.
Here, density refers to Traffic density. Traffic density is a traffic flow characteristic to know about traffic performance from point of view of user and operator. Traffic density is the number of vehicles occupying a unit length of roadway. Measured units are vehicles/mile
Add Answer to:
Question 1 3 pts Density (k) is expressed in units of O Vehicles per Mile O...
1. What is the flow rate if the average headway between 100 vehicles is 5 seconds?...
1. What is the flow rate if the average headway between 100 vehicles is 5 seconds? 2. What is the difference between time-mean speed and space-mean speed? 3. How would you observe the speed, flow, and density of a roadway? Using Greenshields, what is the speed of traffic if the free flow speed is 70 miles per hour, the current density is 70 vehicles per mile, and the jam density is 70 vehicles per mile? 4. What is the speed...
If there are 50 vehicles on a 4000-ft highway lane and the average time headway between...
If there are 50 vehicles on a 4000-ft highway lane and the average time headway between two adjacent vehicles is 2.2 seconds. 3. Calculate traffic density in vehicle/mile (vpm) and average space headway in feet/vehicle (fpv) (1pt) 1) 2) Calculate traffic volume in vehicle/hour (vph). (1pt) 3) Calculate space-mean speed of the traffic on that lane. (1 pt)
Traffic engineering Question 1 A northbound freeway segment is on a 4% upgrade from station 430+60...
Traffic engineering
Question 1 A northbound freeway segment is on a 4% upgrade from station 430+60 to 397-60 and has three l 1 t-wide lanes, a 5 ft right shoulder and has a ramp density of 1 per mile in the 3 miles before and after the mid-point of this freeway segment. The peak-hour factor is 0.9 and northbound traffic during the peak hour is 2400 vehicles, with 20% heavy vehicles (and a 5090 SUT/50% TT mix). Determine the density...
3. What are the two microscopic traffic stream parameters? 4. In speed-flow-density relationships, we use which...
3. What are the two microscopic traffic stream parameters? 4. In speed-flow-density relationships, we use which speed? (space mean speed)/ (time mean speed) 5. Time headway is the time difference between bumpers/rear bumpers 6. The speed limit on a highway is set based on 85a percentile speed. True /False 7. You should be able to identify the following basic q-u-k relationships (shape), what's on x and what's on y, and salient points on the curves. of two successive vehicles. Front...
6, Traffic Shockwave theory (15%) Vehicles approaching an signalized intersection are traveling at speed 40 miles...
6, Traffic Shockwave theory (15%) Vehicles approaching an signalized intersection are traveling at speed 40 miles per hour and the density is about 40 vehicle/miles/lane (vehicle arrival). The red light last about 40 sec. If the saturation flow is 1900 vehhr/lane with a density of 52 veh/miles/hour (queue discharging). and the jam density is 120 veh/mile lane, please determine: a. the queue length at the end of the red light: b. the maximum queue length: c. The time it takes...
Problem 4: Suppose that the movement of rush-hour traffic on a typical expresswa be modeled using the differential equation du du where u(x) is the density of cars (vehicles per mile), and a is dista...
Problem 4: Suppose that the movement of rush-hour traffic on a typical expresswa be modeled using the differential equation du du where u(x) is the density of cars (vehicles per mile), and a is distance miles) in the direction of traffic flow. We w to the boundary conditions ant to solve this equation subject u(0) 300, u(5) 400. a) Use second-order accurate, central-difference approximations to discretize the differential equation and write down the finite-difference equation for a typical point zi...
Quiz: Chapter 7 Review Quiz Submit Quiz This Question: 1 pt 20 of 23 (10 complete) This Quiz: 23 ...
Quiz: Chapter 7 Review Quiz Submit Quiz This Question: 1 pt 20 of 23 (10 complete) This Quiz: 23 pts possible A county is considering rasing the speed limit on a road because they claim that the mean speed of vehicles is greater than 35 miles per hour. A random sample of 20 vehicles has a mean speed of 38 miles per hour and a standard deviation of 5.2 miles per hour. At α = 0.10, do you have enough...
Question Completion Status Question: If 1 mile 1.609 km, what is 55 miles per hour in...
Question Completion Status Question: If 1 mile 1.609 km, what is 55 miles per hour in meters per second (m/sy? QUESTION 4 When a unit occurs in power greater than 1, then the unit in the conversion factor must also be ralsed to the same power. Make sure to raise the number in the conversion factor to the same power as well. Example: if 1 in -2.54 cm, how many cm2 are there in 4.6 in22 Since the power of...
O True O False Question 14 1 pts Consider the periodic discrete-time signal a[k] with period...
O True O False Question 14 1 pts Consider the periodic discrete-time signal a[k] with period No =3. The discrete-time Fourier Series coefficients are computed and found to be Do = 0.5, D1 = + j, and D2 = 0.25j Which of the following is true? O D-1 = = 4 +j Dy = + j DA=0.5 OD 0.25j
Question 2 1.5 pts Use the cohort life table to answer the question. Age Class Survivorship...
Question 2 1.5 pts Use the cohort life table to answer the question. Age Class Survivorship Mortality Fecundity 0-1 0.50 1-2 0.4 2-3 0.33 3-4 0.5 4.2 4-5 5-6 0.0 Assume the initial population was 1000 individuals and the ratio between males and females was 50/50. Which of the following is TRUE? SELECT ALL THAT APPLY. The age class 4-5 produced 150 offspring. Individuals in age class 2-3 were more likely to die than individuals in age class 3-4. Individuals...
1. What is the flow rate if the average headway between 100 vehicles is 5 seconds? 2. What is the difference between time-mean speed and space-mean speed? 3. How would you observe the speed, flow, and density of a roadway? Using Greenshields, what is the speed of traffic if the free flow speed is 70 miles per hour, the current density is 70 vehicles per mile, and the jam density is 70 vehicles per mile? 4. What is the speed...
If there are 50 vehicles on a 4000-ft highway lane and the average time headway between two adjacent vehicles is 2.2 seconds. 3. Calculate traffic density in vehicle/mile (vpm) and average space headway in feet/vehicle (fpv) (1pt) 1) 2) Calculate traffic volume in vehicle/hour (vph). (1pt) 3) Calculate space-mean speed of the traffic on that lane. (1 pt)
Traffic engineering
Question 1 A northbound freeway segment is on a 4% upgrade from station 430+60 to 397-60 and has three l 1 t-wide lanes, a 5 ft right shoulder and has a ramp density of 1 per mile in the 3 miles before and after the mid-point of this freeway segment. The peak-hour factor is 0.9 and northbound traffic during the peak hour is 2400 vehicles, with 20% heavy vehicles (and a 5090 SUT/50% TT mix). Determine the density...
3. What are the two microscopic traffic stream parameters? 4. In speed-flow-density relationships, we use which speed? (space mean speed)/ (time mean speed) 5. Time headway is the time difference between bumpers/rear bumpers 6. The speed limit on a highway is set based on 85a percentile speed. True /False 7. You should be able to identify the following basic q-u-k relationships (shape), what's on x and what's on y, and salient points on the curves. of two successive vehicles. Front...
6, Traffic Shockwave theory (15%) Vehicles approaching an signalized intersection are traveling at speed 40 miles per hour and the density is about 40 vehicle/miles/lane (vehicle arrival). The red light last about 40 sec. If the saturation flow is 1900 vehhr/lane with a density of 52 veh/miles/hour (queue discharging). and the jam density is 120 veh/mile lane, please determine: a. the queue length at the end of the red light: b. the maximum queue length: c. The time it takes...
Problem 4: Suppose that the movement of rush-hour traffic on a typical expresswa be modeled using the differential equation du du where u(x) is the density of cars (vehicles per mile), and a is distance miles) in the direction of traffic flow. We w to the boundary conditions ant to solve this equation subject u(0) 300, u(5) 400. a) Use second-order accurate, central-difference approximations to discretize the differential equation and write down the finite-difference equation for a typical point zi...
Quiz: Chapter 7 Review Quiz Submit Quiz This Question: 1 pt 20 of 23 (10 complete) This Quiz: 23 pts possible A county is considering rasing the speed limit on a road because they claim that the mean speed of vehicles is greater than 35 miles per hour. A random sample of 20 vehicles has a mean speed of 38 miles per hour and a standard deviation of 5.2 miles per hour. At α = 0.10, do you have enough...
Question Completion Status Question: If 1 mile 1.609 km, what is 55 miles per hour in meters per second (m/sy? QUESTION 4 When a unit occurs in power greater than 1, then the unit in the conversion factor must also be ralsed to the same power. Make sure to raise the number in the conversion factor to the same power as well. Example: if 1 in -2.54 cm, how many cm2 are there in 4.6 in22 Since the power of...
O True O False Question 14 1 pts Consider the periodic discrete-time signal a[k] with period No =3. The discrete-time Fourier Series coefficients are computed and found to be Do = 0.5, D1 = + j, and D2 = 0.25j Which of the following is true? O D-1 = = 4 +j Dy = + j DA=0.5 OD 0.25j
Question 2 1.5 pts Use the cohort life table to answer the question. Age Class Survivorship Mortality Fecundity 0-1 0.50 1-2 0.4 2-3 0.33 3-4 0.5 4.2 4-5 5-6 0.0 Assume the initial population was 1000 individuals and the ratio between males and females was 50/50. Which of the following is TRUE? SELECT ALL THAT APPLY. The age class 4-5 produced 150 offspring. Individuals in age class 2-3 were more likely to die than individuals in age class 3-4. Individuals...
Most questions answered within 3 hours.
-
A baseball batter hits a 0.145kg baseball straight up into the
air. The baseball leaves the...
asked 2 minutes ago -
An FM modulator is tested using
single-tone baseband signal with frequency of 50kHz and a sprectrum...
asked 21 minutes ago -
Write the ionic equations for the first stage of salts
hydrolysis.
Anion, Cation?
Na2S
NiSO4
K2SO4...
asked 1 hour ago -
suppose there is a normally distributed population with a mean of
250 and a standard deviation...
asked 2 hours ago -
Question Three
Suppose you as project manager are using the Waterfall
development methodology on a large...
asked 3 hours ago -
Which statement is not true about welfare in Canada?
A.Benefits typically vary based on one's ability...
asked 4 hours ago -
Please help me with FLOWCHART and UML diagram for class,
thank you!
#include <iostream>
#include <fstream>...
asked 4 hours ago -
3. Describe the “logic circuit” of the Lac operon. Which
proteins are bound or not to...
asked 4 hours ago -
Ayesha’s adjusted gross income is $60,000 in 2019. She donated a
piece of artwork with a...
asked 5 hours ago -
For Dijkstra’s shortest path algorithm:
a. Give the Big-O time for Dijkstra’s shortest path algorithm
and...
asked 5 hours ago -
Phosphorus violates the 'octet rule' in biological molecules,
forming more covalent bonds than expected based on...
asked 5 hours ago -
A 1.3 eV electron has a 10-4 probability of tunneling
through a 2.4 eV potential barrier....
asked 5 hours ago