the following data are gathered on a 20-mile long expressway for a period of 120 days. YEAR AVERAGE DAILY TRAFFIC NUMBER OF ACCIDENTS 2010 2753 100 2011 1857 120 2012 1875 95 2013 2548 115 2014 1995 135 2015 2354 150 2016 2158 85 a. Determine in which year has the lowest accident rate per million entering vehicle. b. Determine in which year has the highest accident rate per million entering vehicle. c. Determine the total accident rate per million entering vehicle.

the following data are gathered on a 20-mile long expressway for a period of 120 days. YEAR AVERAGE DAILY TRAFFIC NUMBER OF ACCIDENTS 2010 2753 100 2011 1857 120 2012 1875 95 2013 2548 115 2014 1995 135 2015 2354 150 2016 2158 85 a. Determine in which year has the lowest accident rate per million entering vehicle. b. Determine in which year has the highest accident rate per million entering vehicle. c. Determine the total accident rate per million entering vehicle.

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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7. The following are the tabulation of the coverage count of the average daily traffic on a monthly and weekly basis made with automatic traffic counts on a highway. Use the tables to calculate;(a) the ADT for February and October based on 2 days counts: (i) on Tuesday in February the daily counts were 250 vehicles and (ii) on Friday in October, the daily traffic volume was 300 vehicles. (b) the AADT if the flows counted on Friday, Saturday and Sunday in July were 8000, 6000 and 5000 vehicles on a 16 hourly count basis.(c) the seven day 16 hourly flow in September.
The average queue length at the intersection of the two roads with a stop sign is 4 vehicles. If the arrival rate of vehicles at the stop sign is 300 veh/hr, determine the service rate of the road in veh/hr. Assume both arrival and departure rates are exponentially distributed.
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A toll booth on a temple is open from 8:00 AM to 12 midnight. Vehicles start arriving at 7:45 AM at a uniform deterministic rate of six per minute until 8:15 AM and from then on at two per minute. If vehicles are processed at a uniform deterministic rate of six per minute, determine the (a) time of queue dissipation in minutes (b) total number of vehicles in queue and (c) total vehicle delay
[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
road construction The 20-year projection of annual average daily traffic of a two-way roadway is 36.500 vehicles. Theroad serves as a highway between a residential area and a business area and the expected directionaldistribution factor is D=0.6. The 30th peak hour factor for the roadway is K=0.15. During an hourly vehiclecount, the following values were registered: 1st 15 minutes: 200 cars, 2nd 15 minutes: 130 cars, 3rd 15minute 230 cars, 4th 15 minutes. 180 cars. Estimate the peak hour factor . What is the designdirectional hourly volume for this route?
Question 3 An accident on a freeway of constant flow (arrival rate) of 2430 vehicles per hour occurred at a point X closing the freeway to all morning traffic at 07h00. At 07h15 the freeway is partially opened with a capacity of 1900 vehicles per hour. Finally, the wreckage is removed and, the freeway is restored to a full capacity of 4200 vehicles per hour at 07h35. Assuming a deterministic queue model, (i) graphically illustrate the above traffic flow information (ii) determine the following: - time of queue dissipation ongest queue length - total delay average delay per vehicle - longest wait of any vehicle, assuming a first-in-first-out departure scenario. -
1) The number of accidents has been recorded at an intersection in the last three years as follows: 18, 21, and 19. The accidents were mostly due to left-turning vehicles, speeding, and the absence of left-turn protection. The average ADT for the last 3 years is 8500. The following shows the crash reduction factor for various countermeasures: Countermeasure Reduction Factor Retime signals Provide left-turn signal phase Reduce speed limit on approaches Provide turning guide lines 0.30 0.30 0.35 0.05 a) Determine the appropriate countermeasures b) Determine the expected reduction in crashes if the countermeasures are implemented. The ADT is expected to increase 2%
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A) The following traffic counts were taken on a rural highway during the morning peak hour at (9:00-10:00 am) on Saturday of a week. Time periods (minute) Number of vehicles Find: 9:00-9:30 AM 412 9:30-9:45 AM 702 9:45-10:00 AM 254 1. The hourly volume, the peak rate of flow within the hour, and the peak hour factor. 2. The daily volume for Saturday if the hourly expansion factor (HEF) is 14. B) At a highway segment, six vehicles travel the same distance of 20 miles during 21, 25, 30, 29, 31, and 25 minutes, respectively. These vehicles have stopped at a check points for about 5 minutes. Find the average running and overall travel speeds. C) A parking garage located in Misan city center opens its doors to serve 350 vehicles from 8 am to 3 pm. An analysis of data collected at the parking site indicates that these vehicles are parked for an average of 1.5 hours. If parking efficiency is 0.9, determine the number of additional spaces needs when the number of space-hours increases by 16%.
An expressway consists of four lanes, where the capacity per lane is 2500 vehicles. In normal days, 6500 vehicles pass. However, there is an emergency road repair conducted in which two lanes will be closed. The repair lasted 150 minutes. Calculate the maximum queue length, total length, and number of vehicles impacted by the event, and average individual delay.