The following chart shows the average number of hours commuters spend in traffic delays per year at the six most congested cities in the US. Baltimore New York Houston Los Angeles Chicago Washington 0 O C O OB Most Congested Cities A 10 20 30 40 50 Average Hours per Year 60 70 Which of the following statements is not correct? A) Houston commuters have a higher average number of hours spent per year in traffic delays when compared to New York commuters. 80 B) Los Angeles commuters have a lower average number of hours spent per year in traffic delays when compared to Washington commuters. C) Baltimore commuters have the lowest average number of hours spent per year in traffic delays. D) Chicago commuters have the highest average number of hours spent per year in traffic delays.

The following chart shows the average number of hours commuters spend in traffic delays per year at the six most congested cities in the US. Baltimore New York Houston Los Angeles Chicago Washington 0 O C O OB Most Congested Cities A 10 20 30 40 50 Average Hours per Year 60 70 Which of the following statements is not correct? A) Houston commuters have a higher average number of hours spent per year in traffic delays when compared to New York commuters. 80 B) Los Angeles commuters have a lower average number of hours spent per year in traffic delays when compared to Washington commuters. C) Baltimore commuters have the lowest average number of hours spent per year in traffic delays. D) Chicago commuters have the highest average number of hours spent per year in traffic delays.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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hree routes connect an origin and a destination with performance functions: ?1=8+0.5?1; ?2=1+2?2; and ?3=3+0.75?3; with the x’s being the traffic volume expressed in thousands of vehicles per hour and t’s being the travel time expressed in minutes. If the peak hour traffic demand is 3400 vehicles, determine user equilibrium traffic flows. [Hint: Note that one of the paths will not be used under the equilibrium condition
For this exercise, you are to design a roadway that is to carry 100,000 people a day (excluding truck occupants) – 50,000 in design direction. The vehicles that carry these people include; (1) personal vehicles (average occupancy of 1.2 people per car) 2-2 kip single axles, and (2) buses with 2-22 kip single axles (assume they are filled with an average of 40 passengers). There are also trucks on the roadway and all trucks have 1-40 kip triple axle, 1-32 kip tandem axle, and 1-8 kip single axle. You know that the soil CBR is 6, the initial PSI is 4.5 and the TSI is 2.5. Other values to be used:  All drainage coefficients = 1.0  Reliability = 90%  Overall standard deviation of traffic = 0.50  Concrete Modulus of Elasticity = 5.5 million lb/in2  Concrete Modulus of Rupture = 750 lb/in2  PCC load transfer coefficient = 3.0 Design a rigid and flexible pavement, to last 15 years, for a four-lane road (four lanes in design direction) with 400 trucks per day in the design direction, and…
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.
At exactly 8:00 AM, vehicles start to enter a single toll gate at a rate of 8 veh/min following a deterministic distribution. Due to the teller being late, the toll booth opened at 8:10 AM having a service rate of 10 veh/min following a deterministic distribution. What is the Maximum Queue Length in the system? What is the longest waiting time in the system?
Question 5 A shopping centre has two types of checkouts, traditional checkouts which are staffed by cashiers, and which are usually preferred by older customers, and self- serve checkouts which are preferred by younger customers. One day, it was recorded that an average of 20 older people an hour left the staffed checkouts and approximately 1 young person every two minutes began queuing for the self- checkout machines. If both checkout methods have an average wait time of 5 minutes per person, what is the arrival rate for the traditional checkouts and the departure rate for the self-checkouts? O A 20 people/hr; µ = 19 people/hr A 19 people/hr; μ = 20 people/hr λ = 13 people/hr; μ = 39 people/hr λ = 39 people/hr; μ 13 people/hr
[T] The following table provides hypothetical data regarding the level of service for a certain highway. Plot vehicles per hour per lane on the x-axis and highway speed on the y-axis. Compute the average decrease in speed (in miles per hour) per unit increase in congestion (vehicles per hour per lane) as the latter increases from 600 to 1000, from 1000 to 1500, and from 1500 to 2100. Does the decrease in miles per hour depend linearly on the increase in vehicles per hour per lane? Plot minutes per mile (60 times the reciprocal of miles per hour) as a function of vehicles per hour per lane. Is this function linear? Highway Speed Vehicles per Hour per Lane Density Range (vehicles / mi) > 60 < 600 < 10 60 - 57 600 - 1000 10 - 20 57 - 54 1000 - 1500 20 - 30 54 - 46 1500 - 1900 30 - 45 46 - 30 1900 - 2100 45 - 70 < 30 Unstable 70 - 200
Compute the annual ESAL for the traffic summarized in the table below, using the fourth power formula and assuming 350 days per year to compensate for reduced traffic on weekends. Weekday Traffic Data Truck Gross Weight Average (lbs) 20,000-40,000 40,100-66,000 66,100-80,000 80,100-110,000 Load on Steering Axle Load Distribution (Front/Rear) Number of Trucks 32,000 58,000 76,000 108,000 Weight (lbs) 3-Axle, All Single equal load singles front, -S2 for one tandem for the rear, -2 for two equal load singles for the trailer) 200 0 0 Trailer 5-Axle, 3-S2 Semi 5-Axle, 3-S2-2 Semi + (3 for one steering (3 for one steering single single and two and two equal load for the 8,000 lbs. Equal for the front, -S2 for one tandem for the rear) 330 800 800 300 12,000 lbs. 60/40 380 320 350 360 14,000 lbs. 30/30/20/20
Drivers arrive at a toll booth at a rate of 5 per minute during peak traffic periods. The time between consecutive driver arrivals follows an exponential distribution. What is the probability that it will take a) more one minute between consecutive drivers? b) between 30 seconds and 90 seconds between consecutive drivers?
Can someone please show me how to solve this step by step. Thank you Suppose you are hired by the UHM Transportation and Traffic Lab (TTL) to analyze vehicle arrivals at one lane of the interchange bridge connecting I-25 and I-40 for the period from 12:00am to 4:00am in a weekday. It is known that vehicle arrivals follow a Poisson process at this location. There is a single-loop detector embedded on this lane at the end of the interchange bridge. Since you do not want to go to the bridge to count vehicles at this time period, you decided to use the loop detector data for the analysis. Of the 720 20-second intervals (the loop detection system stores data every 20 seconds), 508 intervals were identified to have at least one vehicle detected. Assume the loop detector is free of error. Please estimate the vehicle arrival rate (vehicles per second) for this lane. With the estimated arrival rate, please calculate the probability of having three or more vehicles detected in a 20-second…
The following travel times are measured for vehicles as they cross the highway 2.0 miles long. Calculate time average speed (TMS) and average speed space (SMS) for this data. Why is SMS always lower than TMS?
13. An incident that occurs on a particular highway results in traffic incurring an average delay of one hour per vehicle. An estimated 2,000 vehicles are impacted by the incident. If the distribution of traffic is comprised of 5% five-axle trucks, 2% three-axle trucks, 4% six-tire trucks, 2% four-tire trucks, 4% medium auto for business purposes, 3% small auto for business purposes, and the remainder are automobiles for personal purposes, what is the value of the total delay incurred by the traffic.