A section of highway shows a linear relationship between speed and density during a peak hour. If the free flow speed is 63 mph, and the jam density is 208 vehicles per mile (veh/mile), what is the density in vehicles per mile at capacity? Options: A. 104B. 312C. 416D. 605
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A section of highway shows a linear relationship between speed and density during a peak hour. If the free flow speed is 63 mph, and the jam density is 208 vehicles per mile (veh/mile), what is the density in vehicles per mile at capacity?
Options: A. 104
B. 312
C. 416
D. 605
Step by step
Solved in 2 steps
- On a specific westbound section of highway, studies show that the speed-density relationship is: It is known that the capacity is 5200 veh/h and the jam density is 310 veh/mi. What is the a.) space-mean speed of the traffic at capacity, (mph) b.) and what is the free-flow speed? (mph)A lane on a freeway displays the following characteristics: (a) the average headway between vehicles is 2.8s, and (b) the average spacing between vehicles is 235 ft. What is the rate of flow for the lane? What is the density of traffic in the lane? What is the average speed (in mph)?9. A segment of a highway was designed for a free flow speed of 90 mph. At the time of observation along the segment, it was recorded that same segment was at its maximum flow. What is the average speed of vehicles at this instant? a) 60 kph b) 45 kph c) 55kph d) 75kph 10. In Problem 9, what is the density of vehicles at maximum flow? a) 1/3 jam density b) 1/4 jam density c) 1/2 jam density d) none of these
- solve quickly...Q3. On a specific westbound section of highway, studies show that the speed density is a non linear relationship and it is, u = uf[1- (k/k;)3.5] The capacity (maximum flow) of the highway is 3800 veh/h and the jam density kj is 140 veh/km. (a) What is the speed (space man speed) of traffic at capacity? What is the free flow speed?Ex2/ The speed density relationship of traffic on a section of free way lane was Vs =18.2ln 220 1- what is the max flow, speed and density at this flow ? 2- what is the jam density ?
- A section of highway has a speed–flow relationship of the form q = au2 + bu, where q is the traffic flow in veh/h, u is the space-mean speed of traffic in mi/h, and a and b are unknown parameters. It is known that at capacity (which is 3100 veh/h) the spacemean speed of traffic is 28 mi/h. Determine the speed when the flow is 1500 veh/h and the free-flow speed.A section of a freeway has a speed-density relationship as following: veh If density 30- then assuming a linear speed-density relationship, and the hr > speeds and densities of the freeway are shown in the table below: Speed (mile/hr) 45 60 Density (veh/hr) 90 60 Find: 1- Free-flow speed and Jam density. 2- The space-mean speed, flow, and density at freeway capacity. 3- The density and space-mean speed when the flow is 2250 (veh/hr).QUESTION 4 A segment of rural freeway is being designed for a FFS of 70 mph through rolling terrain. The directional (i.e. one-way) design volume is 3,000 vehicles per hour. If 10% of the design volume is expected to be heavy vehicles (i.e. trucks and buses), what is the heavy vehicle adjustment used to determine the flow rate? Provide you answer to the nearest hundredths.
- A section of the roadway has the following flow-density relationship q=50k-0.4k^2 [q is in veh/h unit and k in vh/mile]. What is the flow, speed,and density at capacity? What is the density when highway is at one-third of its capacity.A segment of rural freeway is being designed for a FFS of 70 mph through rolling terrain. The directional (i.e. one-way) design volume is 3,000 vehicles per hour. If 10% of the design volume is expected to be heavy vehicles (i.e. trucks and buses), what is the heavy vehicle adjustment used to determine the flow rate? Provide you answer to the nearest hundredths.1) A 6-lane two-way arterial road has a maximum flow of 6,000 vehicles per hour on one direction. It is operating at 3,600 vehicles per hour at time, t=0. A collision occurs, blocking the two lanes, and restricting the flow of the outermostlane to 1,600 vehicles per hour. After 40minutes, the police have cleared the middlelane from accident debris; the operating volume at that time increased to 2,400 vehicles per hour.20 minutes past, the innermost lane was finally cleared of the accident. Traffic returns to normalas soon as the queue has already immoderate. a.Determine the maximum length of queue that occurred. b.How long did it take to dissipate the queue? c.If a vehicle entered the road at t=10 minutes, how long will it take for it to leave the traffic?