**Please draw all necessary diagrams showing shockwaves.** Due to a road crash, the southbound direction of a 2-lane, 2-way highway was completely closed. Before the event, vehicles were running at 40 kph with density of 20 vpk. It took 35 minutes before the road got cleared again due to road crash investigation, waiting for emergency response team, and clearing of debris. The traffic stream follows Greenshield's model with free flow speed of 50 kph and jam density of 90 vpk. a.) Draw all necessary diagrams showing shockwaves.

Please draw all necessary diagrams showing shockwaves. Due to a road crash, the southbound direction of a 2-lane, 2-way highway was completely closed. Before the event, vehicles were running at 40 kph with density of 20 vpk. It took 35 minutes before the road got cleared again due to road crash investigation, waiting for emergency response team, and clearing of debris. The traffic stream follows Greenshield's model with free flow speed of 50 kph and jam density of 90 vpk. a.) Draw all necessary diagrams showing shockwaves.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter6: Fundamental Principles Of Traffic Flow

Section: Chapter Questions

Problem 9P

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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?
Traffic on a freeway gives a Greenshield's traffic flow relationship expressed as: Q = 60k-0.16667k? At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulder of the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on the side of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway, the patrol car notes that traffic on the freeway is moving along at about 40 kph. Determine the following: 1. Capacity flow of the highway 2. Traffic shockwave created by the road accident 3. Time in AM the patrol car will reach the accident zone 4. Plotted traffic shockwave line in the Q-k traffic model diagram
An accident occurs on a one-lane highway and blocks off all lanes of traffic. This freeway has a jam density of 130 veh/mi. Before the accident occurred (and upstream of the queue that forms), traffic was (is) traveling at an average speed of 45 mi/h and density of 30 veh/mi. Assume that the following conditions are present: ● ● Before the queue: Uupstream = 45 mi/h, kupstream = 30 veh/mi After the queue: Udownstream = 60 mi/h, kdownstream = 0 veh/mi Jam Density: kj = 130 veh/mi How long is the queue after 25 minutes?
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
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Traffic on a freeway gives a Greenshield's flow relationship expressed as: Q = 65k-0.354k2 At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulder of the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on the side of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway, the patrol car notes that traffic on the freeway is moving along at about 60 kph. Determine the following: 1. Capacity flow of the highway 2. Traffic shockwave created by the road accident 3. Time in AM the patrol car will reach the accident area 4. Traffic shockwave line as plotted and shown in the Q-k traffic model diagram
An incident occurs on a freeway that has a capacity in the north bound direction, before incident, of 4000 veh/h and a constant flow of 2900 veh/h during the morning commute (no adjustments to traffic flow result from the incident). At 8:00am, a vehicle crash closes the freeway to all traffic. At 8:12am, the freeway is partially opened with a capacity of 2000 veh/h. Finally, the crash site is removed and the freeway is restored to full capacity of 4000 veh/h at 8:31am. Assuming the traffic follows a D/D/1 queueing (FIFO queue discipline) to determine time of queue dissipation, longest queue length, total delay, average delay per vehicle, and longest wait of any vehicle.
Traffic on a freeway gives a Greenshield's flow relationship expressed as: Q = 65k-0.354k2 At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulder of the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on the side of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway, the patrol car notes that traffic on the freeway is moving along at about 60 kph. Determine the following: 1. Capacity flow of the highway 2. Traffic shockwave created by the road accident 3. Time in AM the patrol car will reach the accident area 4. Traffic shockwave line as plotted and shown in the Q-k traffic model diagram Note: Show full solution. Do not copy in chegg it has different question Topic: Highway Engineering (Greenshield Model)
2cb) The average speed of a 1st group of vehicles over a road msegment is per 45 km/h and their flow is 1350 vehicles hour. The average speed of a 2nd group of vehicles over the same segment is 40 km/h and their flow is 1800 hour. Determine the maximum flow of the vehicles per whole traffic stream? Wat mumiyan to booge all
The length of a highway is 550 m when a head-on vehicle collision occurred. Police reports show that neither human error nor vehicle malfunction was the cause of the collision. Check if the length of the highway is sufficient for an overtaking maneuver. *Accident Report: Speed of Overtaking Car = 96 kph, Speed of Overtaken Car = 88 kph, Perception-reaction Time = 2.5 sec, Average acceleration = 2.4 m/sec2, Time of the passing vehicle occupying the left lane = 10.4 sec, Distance between the passing vehicle at the end of its maneuver and the opposing vehicle = 84m.
A T-intersection has a total of 2,400 collision incidents over the last 5 years. Given that the annual daily traffic recorded for this period is 57,079. Determine the accident rate of the intersection per million entering vehicle? A__23.039 accidents per mev. B__23.309 accidents per mev. C__23.093 accidents per mev. D__23.390 accidents per mev. The design speed of a parabolic curve is 80 kph having a soil grade of g1 = 3% and g2 = -4% with Sp =550m. Determine the length of the curve? A__2112m B__2113.5m C__2113.510m D__2131.510m If a town has a total of 152,400 registered vehicles in 2016. Determine the rate of accident per 9,000registered vehicles if the number of accidents on the same is 356? A__21.024 accidents per 9,000 vehicles B__22.024 accidents per 9,000 vehicles C__20.024 accidents per 9,000 vehicles D__None of the above
PLEASE WRITE THE SOLUTIONS A T-intersection has a total of 2,400 collision incidents over the last 5 years. Given that the annual daily traffic recorded for this period is 57,079. Determine the accident rate of the intersection per million entering vehicle? A__23.039 accidents per mev. B__23.309 accidents per mev. C__23.093 accidents per mev. D__23.390 accidents per mev. The design speed of a parabolic curve is 80 kph having a soil grade of g1 = 3% and g2 = -4% with Sp =550m. Determine the length of the curve? A__2112m B__2113.5m C__2113.510m D__2131.510m If a town has a total of 152,400 registered vehicles in 2016. Determine the rate of accident per 9,000registered vehicles if the number of accidents on the same is 356? A__21.024 accidents per 9,000 vehicles B__22.024 accidents per 9,000 vehicles C__20.024 accidents per 9,000 vehicles D__None of the above