22: Give short answers (in one or two sentences) for the following questions. A. Why does LOS F not have a maximum service flow rate value? B. A freeway had six (06) accidents in a year but the traffic engineer did not apply the correction factor for incident on its capacity for calculating LOS, why?
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- 1. A study of freeway flow at a given site has yielded a relationship speed-density calibrated as follows: S = 57,5(1 - 0,008 D) For this relationship, specify: (a) free flow velocity, (b) congestion density, (c) velocity-flow relationship (d) flow density relationship, and (e) capacity. 2. Answer all the questions in Problem 1 for the calibrated density-velocity relationship the following: S = 61.2e^-0015DQuestion 2 Because the new travel time rate (TTR) from the additional traffic (e.g., 300vph) exceeds the minimum acceptable local standard of 2.0 min/mile, it is proposed to increase the road capacity by 900vph/lane by adding one lane in each direction. Calculate the new travel time rate and traffic volume using: a. The traditional method of traffic impact analysis, and b. The above-mentioned pivot point analysis method. c. Compare the results of the two methods and comment on their significance.5. The table below gives data on accepted and rejected gaps of vehicles on the minor road of an unsignalized intersection. If the arrival of major road vehicles can be described by the Poisson distribution, and the peak hour volume is 1100 veh/h, determine the expected number of accepted gaps that will be available for minor road vehicles during the peak hour. Number of Rejected Gaps > t Number of Accepted Gaps >t Gap (t) (s) 1.5 92 3 2.5 52 18 3.5 30 35 4.5 10 62 5.5 2 100
- This is a three-part question. Data obtained from aerial photography showed eight vehicles on an 800 ft-long section of road. Traffic data collected at the same time indicated an average time headway of 3.7 sec. Part A. Determine the density on the highway in vehicles per mile. Part B. Determine the flow on the road in vehicles per hour. Part C. Determine the space mean speed in mph.QUESTION 9 What is the service flow rate (pcphpl) for a freeway segment that has a free flow speed of 55 mph if a LOS B is to be maintained? Provide your answer to the nearest integer.9. Calculate the estimated free flow speed of a Class II two-lane highway if the field measured mean speed is 56.5 mph and the flow rate during the field data collection was 650 vph and all vehicles are passenger vehicles.
- What are the major types of data that are needed for freeway congestion management? Emphasize on recurrent, non-recurrent, and emergency-event induced freeway congestion.Traffic flow in an urban section at the intersection of two highways in the design year are given below. Appr Left turning Straight ahead Right turning oach Cars Commer Scoot Cars Comm cial ers ercial Scoot Cars Comm ers ercial Scoot ers N 200 50 100 250 100 150 150 5 50 80 E 180 60 80 220 50 120 200 40 120 S 250 80 100 150 50 90 160 70 90 W 220 50 120 180 60 100 250 60 100 The highways at present intersect at right angles and have a carriageway width of 15 m. Design a rotary intersection making suitable assumptions.Please read the question carefully and give me right solution. Subject : Transportation engineering Given below is an intersection and respective flows for every movement (per lane). The intersection is programmed to operate in two phases: Phase 1 (EB, WB) and Phase 2 (NB, SB). What is the critical lane flow for Phase 2?
- d. Different types of traffic counts are carried out, depending on the data's anticipated use to be collected. Select and describe the method and equipment you will recommend for traffic volume counts for each road below. Give reasons for your recommendations. 1. A private road leading to an industrial development 2. A residential street 3. A rural collector road 4. A section of an interstate highway4-14 Table 4.10 shows data obtained in a travel time study on a section of highway using the moving-vehicle technique. Estimate (a) the travel time and (b) the volume in each direction at this section of the highway. Chapter 4 Traffic Engineering Studies 149 Table 4.10 Travel Time Data for Problem 4-14 No. of No. of No. of Vehicles Vehicles That Vehicles Run Travel Traveling in Орposite Overtook Overtaken by Test Vehicle Direction/ Time Test Number (min) Direction Vehicle Northward 5.25 100 2 2 2 5.08 105 2 1 3 5.30 103 3 1 4 5.15 110 1 5.00 101 6. 5.51 98 7 5.38 97 1 1 8 5.41 112 2 3 5.12 109 3 1 10 5.31 107 Southward 1 4.95 85 1 2 4.85 88 1 3 5.00 95 1 4 4.91 100 2 1 4.63 102 1 5.11 90 1 1 7 4.83 95 8 4.91 96 3 1 9 4.95 98 1 2 10 4.83 90 1QUESTION 5 Calculate the service flow rate (pcphpl) for a multilane highway that has a free flow speed of 50 mph if a LOS B is to be maintained? Provide your answer to the nearest integer.