According to the basic graphs of the two commonly used traffic flow macroscopic models (Greenshields' and Greenberg's) for speed-density relationship; Greenshields' is considered more adequate to be used at low traffic densities.
Q: A portion of the extension of SLEX has a free flow speed of 60kph and a capacity of 3600 veh/hr. If…
A: Given Free flow speed ,Vf = 60 KPH Traffic capacity ,q = 3600 veh /hr
Q: A study on a road segment shows that at flow of 1200vph the speed was 30 km/hr and at flow of 600vph…
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Q: Based on a field traffic study, the flow-density relationship for a minor arterial street was found…
A: given data flow density condition is given as Q=44D-0.6D2
Q: Obtain equation y-a.e^(bx) for the following traffic data
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Q: The recorded number of vehicles on a 1.2 km stretch of highway is 39. Calculate the density of…
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Q: A traffic data has been collected on two points on a highway: Point A and Point B, 450m apart.…
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Q: In a given instant, there were 2400 vehicles counted at a specific point along the portion of the…
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Q: Three vehicles are recorded with speeds of 80, 70, and 200 mi/h. Find average time mean speed for…
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Q: 6-7 The table below shows data on speeds and corresponding densities on a section of a rural…
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Q: In a 500 m section of highway, there are 10 vehicles observed. The time headway is 4 sec. Determine…
A: Given data, Length d = 500 m Number of vehicles observed n = 10 Time headway t = 4 sec
Q: Data obtained from aerial photography showed six vehicles on a 600 ft-long section of road. Traffic…
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Q: Six vehicles were observed passing a point for every 25 sec. the density of traffic is 30 veh/km.…
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Q: y=a.e^(bx) for the following traffic data
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Q: نقطة واحدة Interrupted and uninterrupted flow is a measure of the quality of .traffic flow True O…
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Q: If 420’ are available as Sight distance on an urban highway having a 2.5% grade. Assuming all the…
A: Given - Sight distance = S = 420ft. Grade = G = 2.5% Formula used - As per the Geometric Design…
Q: 24-h traffic count at a road section was observed to be 1000 vehicles on a Tuesday in the month of…
A: given- 24-hr traffic count=1000 vehdaily adjustment factor=1.121monthly adjustment factor=0.913
Q: A single-lane highway has a traffic density of 40 vehicles km If the time-mean speed and space-mean…
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Q: 5. Calculate the minimum passing sight distance required for a two-lane rural roadway that has a…
A: The formula of minimum passing sight distance is given by,
Q: The speed-density relationship for a particular road was found to be : u = 42.76 - 0.22 k, %3D where…
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Q: A traffic count was conducted to a rural road, if the peak hour traffic volume is 4000 vehicle/day.…
A: Given Data: The peak hour volume is, q=4000 vehicle/day The traffic composition is given as 70% Pc,…
Q: A traffic stream displays average vehicle time headway of 2 sec at space mean speed 60 km/hr.…
A: Given: Average time headway = 2 sec Space mean speed = 60 km/hr
Q: Given that (40 vehicles) pass during roadway section in ( 60 sec.) and travel length (1000 m). What…
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Q: with some suitable examples. Also explain the macroscopic and microscopic traffic flow p
A: Microscopic traffic flow Road traffic flows are composed of drivers associated with individual…
Q: A) The following traffic counts were taken on a rural highway during the morning peak hour at…
A: Hi! Thank you for the question As per the honor code, We’ll answer the first question since the…
Q: Eight lane urban freeway is on level terrain with lane width of 12 ft, right shoulder lateral…
A: Total number of lanes = n = 8 Lane in one direction = N = 4 Lane width = w = 12ft. Right shoulder…
Q: 1. Data on traffic passing thru an intersection indicates that vehicles moved at a space mean speed…
A: This question is related to the Traffic and Highway Engineering. In this question we calculate the…
Q: One of the following choices is not among the variables which affect the traffic volume…
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Q: Data obtained from aerial photography showed six vehicles on a 600 ft – long section of road.…
A: The length of the road section is L=600 ft. The number of vehicles are n=6. The time headway is T=4…
Q: A section of highway has a speed-flow relationship of the form q = au? + bu It is known that at…
A: Given data Speed-flow relationship, q = au^2 + bu Highway capacity =3100 veh/h The space-mean speed…
Q: Calculate the minimum passing sight distance required for a two-lane rural roadway that has a posted…
A: Given :- Posted speed limit = 45 mi/h Average speed of the passing vehicle = 47 mi/h An average…
Q: 3. If 5473 vehicles passes a certain lane of road with an average speed of 60 kph, determine the…
A: Appropriate spacing of the vehicles: S= 10.96 m/vehicle
Q: A traffic data has been collected on two points on a highway : Point A and Point B, 450m apart.…
A: Given data Speed of vehicle V1 = 52 kmph V2 = 78 kmph V3 = 62 kmph…
Q: equation y=a.e^(bx) for the following traffic data
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Q: In the typical curve of flow-density relationship, the traffic condition(s) where traffic :flow…
A: The Curve for Flow-Density and its illustration is Given Below:
Q: Calculate the minimum passing sight distance required for a two-lane rural roadway that has a posted…
A: Passing Sight Distance can be calculated as:
Q: For a given section of road, relationship between speed and density is obtained asu = 53 – 0.43 k,…
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Q: The following are the average field values for the traffic data obtained by the moving vehicle…
A: Highways and part of them are mainly for people connecting from one place to another at a given time…
Q: A single-lane highway has a traffic density of 40 vehicles/km. If the time-mean speed and space-mean…
A: Given data- Density k = 40 veh/kmTime mean speed vt = 40 kmphSpace mean speed vs =30 kmph
Q: The following figure shows the Level of Service (LOS) criteria for a multilane highway segment. If…
A: Solution: Given Data: Free flow speed, VS=45 mph Flow rate, S=1800 passenger cars per hour per lane…
Q: 2. Data obtained from aerial photography showed six vehicles on a 600 ft - long section of road.…
A: Given: The number of vehicles is 6. The length of the road is 600 ft. The average time headway is 4…
Q: How are interrupted flow and uninterrupted flow of traffic stream defined? With diagram explain the…
A: Interrupted flow Interrupted flow is the flow regulated by an external means, such as a traffic…
Q: 10. The following data were taken on five vehicles travelling a 2.5k portion of the NLEX. Determine…
A: We will take average of all the five length of portion
Q: Calculate the minimum passing sight distance required for a two-lane rural roadway that has a posted…
A: A] step-1] Given data speed limit 45 mi/r Average speed of passing veticle =…
Q: SITUATION: A section of the extension of the NLEX connecting Pampanga and Tarlac is known to have a…
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Q: Example: Five vehicles are traveling at similar speed of 80km/hr, and similar clear spacing of 30m.…
A: Calculating the time headway for each vehicle: =30+580×0.278=1.573 sec Calculating the flow rate:…
Q: The essential five methods used to control conflicting streams of vehicles at intersection are :…
A: Vehicles are generally used to move us from one place to another by means of transport. Thus this is…
Q: Eight lane urban freeway is on mountainous terrain with lane width of 12 ft, right shoulder lateral…
A: Given data, Flow rate = vp = 500 pcphpl Lane width = 12 ft (No adjustment required) Right side…
Q: Greenberg's speed-density relation equation for the following traffic data.
A: Greenberg's model, also known as log model, is given by the equation v=vmlnkmk, where v is the…
Q: A traffic count was conducted to a rural road, if the peak hour traffic volume is 1500 vehicle/day.…
A: passenser car unit for bus and truck =3then total traffic composition in term of…
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- Plz solve fast! A traffic stream display average vehicle time headway of 2 sec at space mean speed 60 km/hr compute average space headway, flow rate and density for traffic stream?The following are specifications for traffic design of a highway:Speed of the passing car = 100 kphSpeed of the overtaken vehicle = 80 kphTime of initial maneuvers = 5 secTime passing vehicle occupies left lane = 10 secsDistance between the passing car and opposing car at the end of maneuver = 20 mAverage acceleration = 2.5 kph/sec. 1. Determine the required total passing sight distance for said road a. 502.75 m b. 602.75 m c. 702.75 m d. 402.75 m 1. Find the minimum required passing sight distance. a. 280.37 m b. 390.37 m c. 48.37 m d. 490.37 mA traffic stream display average vehicle time headway of 2 sec at space mean speed 60 km/hr compute average space headway, flow rate and density for traffic stream?
- Draw the diagram and compute the passing sight distance for the following data:Speed of the passing car = 96 kphSpeed of the overtaken vehicle = 88 kphTine of initial maneuver = 4.3 secAverage acceleration = 2.37 kph/secTime passing vehicle occupies the left lane = 10.4 secDistance between the passing vehicle at the end of its maneuver and the opposing vehicle = 76 mGive the Greenberg's speed-density relation equation for the following traffic data.Briefly describe highway developmentThe speed of overtaking vehicle is 90 kmph and acceleration is 3 km/hr/sec. Calculate the safe passing sight distance for one-way and two-way traffic. Calculate the length of overtaking zone. Also draw the same. in India.
- 17 An existing urban freeway with 4 lanes in each direction has the following characteristics: Traffic data: Peak hour volume (in the peak direction): 7070 veh/h Trucks: 10% of peak hour volume PHF _ 0.94 Geometric data: Lane width: 11 ft Shoulder width: 6 ft Interchange spacing (average): 1.4 mile Terrain: rolling Determine the LOS in the peak hour. Clearly state assumptions used for any values not given. Show the demand flow rate, mean speed, and density for the given conditions.A section of highway having a length 60 m. The observed data are 6 vehicles cross over it in a period of 148 sec., for the following duration: 2.4, 2.8, 3.0, 2.1, 2.2, and 3.5 sec. Estimate the values of the flow rate, density, space-mean speed, time-mean speed, average gap. and average clearance. If the length of vehicles are 6, 5.4, 6.6. 4.8, 7.5, and 6 m respectively?1. The rate flow at a point in the highway is 1200 vehicles/hour. Find the space mean speed in mph if the density of traffic is 25 vehicles per mile 2. Assume you are observing traffic in a single lane of McArthur Highway at a specific location. You measure the average headway and average spacing of the vehicles as 3.2sec. and 50 m. respectively. Determine the traffic speed in kilometer/hour
- An existing Class I two-lane highway is to be analyzed to determine the level of servicein each direction, given the following information:Traffic data:PHV = 600 veh/h60% in the peak direction8% trucks2% recreational vehiclesPHF = 0.86No passing zones: 40%Geometric data:Rolling terrainBFFS = 55 mi/h (88 km/h)Lane width = 11 ft (3.3 m)Shoulder width = 2 ft (0.6 m)8 access points per mile (5 access points per km)Traffic volume is 2578 veh/hr with 687 vehicles arriving in peak 15 minutes.There are tow lanes, 12 percent trucks(30/70 split for SUT/TT), the length of the road is 1.8 miles long with a 3.5 percent grade. calculate the analysis flow rate?Given the following data: SSD = 430’ G = +3% Tpr = 2.5 sec Will the speed/velocity be acceptable if the road is generally posted at 30kph? Why or why not?