Traffic flow data were collected on a segment of I-84 highway. The study has revealed the following speed and density relationship: u=60(1−k^2/248400) a) Determine the capacity of this highway. b) When the flow is 2,800 veh/h, compute the corresponding density and vehicle spacing of this traffic stream.
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Traffic flow data were collected on a segment of I-84 highway. The study has revealed the following speed and density relationship:
u=60(1−k^2/248400)
a) Determine the capacity of this highway.
b) When the flow is 2,800 veh/h, compute the corresponding density and vehicle spacing of this traffic stream.
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- Given a freeway flow study at a certain highway. The speed- density relationship is described in thegiven equation or relationship:V s = 60- 0.48kDetermine the following:a. Free-flow speed and jam densityb. Derive the equation describing flow and speed.c. Derive the equation describing flow and density.d. Determine the capacity of highwayThe table below shows data on speeds and corresponding densities on a section of a rural collector road. If it can be assumed that the traffic flow characteristics can be described by the Greenberg model, develop an appropriate relationship between the flow and density. Also determine the capacity of this section of the road.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.
- A traffic engineer has set up a one-mile study segment of a corridor. He measures the speed of 10 vehicles. Calculate the space mean speed and time mean speed of these vehicles. If the space mean speed occurs at an optimal flow with a density of 75 veh/mi, what is the capacity of this roadway?Problem 6 Traffic on a single-lane urban street observes the following flow-density relationship: q=30k(1-k/180), where q is the traffic flow in vehicles per hour (VPH), and k is the traffic density in vehicles per mile (VPM). Answer the following questions: a. | Calculate the free flow speed, capacity, and jam density of the traffic flow. b. What is the minimum spacing and the minimum (time) headway of the traffic flow? What is the traffic volume when the travel speed is 20 MPH? C.only HANDWRITTEN answer needed ( NOT TYPED)
- The table below shows data on speed and corresponding densities on a section of a collector road. It can be assumed that the traffic flow characteristics can be described by the greenberge model, develop an appropriate relationship between flow and density. Also deyerdete the capacity of this section of the road Speed kph density veh/km 60 20 46 32 40.8 38 39.3 40 35.7 45 32.6 50 30.8 53 28.4 57 24.7 65 18.5 80Question 1 A traffic study at location A gave the following data in Table Q1. Table Q1: Speed and density data Speed (km/h) 5 20 30 40 Density (veh/km) 150 120 100 70 a) Derive the Greenshields model for the data in table QI. Find the maximum flow. b) c) Density for a speed of 45 km/h.Given the following data on a certain highway section: uf=90km/hr and qcap=3600veh/hr Calculate the density corresponds to the flow value q=900veh/hr
- The speed density relationship for a particular road was found to be u = 42.76-0.22k, where 'u' is the speed in kmph and 'k' is the density of vehicles per km. Find the capacity of the road. Give your comment on the result. Sketch the relationship between density and flow and indicate important traffic flow parameters on it.6-7 The table below shows data on speeds and corresponding densities on a section of a rural collector road. If it can be assumed that the traffic flow characteristics can be described by the Greenberg model, develop an appropriate relationship between the flow and density. Also determine the capacity of this section of the road. Speed (mi/h) Density (veh/mi) Speed (mi/h) Density (veh/mi) 60.0 20 32.6 50 46.0 32 30.8 53 40.8 38 28.4 57 65 80 39.3 40 24.7 35.7 45 18.5Choose the right answer a rural highway on a level terrain has the following traffic composition: 40 % Passenger cars 30 % trucks 20 % buses 10 % recreational vehicles Find the total volume expressed as pcu/hr. if the total volume is 6000 veh/hr. * a-7620 b-7630 c-7640