If the mean free speed and jam density for a highway were 60 mph and 160 vehicles per mile respectively, what would be the expected volume if the space mean speed of the traffic was 45 mph? At what other speed might this volume occurs?
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If the mean free speed and jam density for a highway were 60 mph and 160 vehicles per mile respectively, what would be the expected volume if the space mean speed of the traffic was 45 mph? At what other speed might this volume occurs?
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- Traffic flow on a section of a two-lane highway can be described by the Greenshields model, with a mean free speed of 54 mi/h and a jam density of 146 veh/mi/In. At the time when the flow was 90 percent of the capacity of the highway, a large dump truck loaded with heavy Industrial machinery from an adjacent construction site joins the traffic stream and travels at a speed of 18 mi/h for a length of 3.5 mi along the upgrade before turning off onto a dump site. Due to the relatively high flow In the opposite direction, it is impossible for any car to pass the truck. Determine how many vehicles will be in the platoon behind the truck by the time the truck leaves the highway.Traffic flow on a four-lane (one direction) freeway can be described by the Green- shields model. Two lanes of the four lanes on a section of this freeway will have to be closed to undertake an emergency bridge repair that is expected to take 2 hr. The mean free speed of the highway is 60 mi/h and the jam density is 140 veh/mi/ln. If it is estimated that the demand flow on the highway during the emergency repairs is 80% of the capacity, using the deterministic approach, determine: (a) The capacity of the highway per one lane, and per all 4-lanes (b) The reduced capacity of the highway after closure (c) Maximum queue length that will be formed (d) The total delay (e) The number of vehicles that will be affected by the incident (f) The average individual delayOn a freeway with a flow of 1600 vehicles per hour and an absolute maximum space mean speed of 110mph, the following point speeds were observed (in mph): 52,48,58,43,58,54,62,51,58,55,59,59,53,50,54. Determine the jam density, in vehicles per mile.
- A highway has on average a vehicle every 28 ft while queuing. What is the jam density in vehicles/mi/In? If this direction of the highway has a free-flow speed of 65 mph, what is the Greenshields speed when density is 35 veh/mi/ln?Question A linear relationship is observed between speed and density on a certain section of a highway. The free flow speed is observation to be 80 km per hour and the jam density is estimated as 100 vehicles per km length. Based on the above relationship, the maximum flow expected on this section and the speed at the maximum flow will respectively beThe SLEX was designed to carry a free-flow speed of 50 kph and a capacity of 4000 veh/hr. At a certain point near the intersection of a road leading to Laguna, there were 3600 vehicles counted in one hour. Assume a linear relationship. Determine the space-mean speed. Determine the jam density.
- On a specific section of highway, the speed-density relationship is as bellow: 1.5 S = S, It is known that the capacity is 2000 pc/hr/In and the jam density is 175 pc/mi/In. What is the space-mean speed of the traffic at capacity, and what is the free-flow speed? Round your answers to the nearestEx2/ 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 ?Traffic flow on a four-lane (one direction) freeway can be described by the Greenshields model. Two lanes of the four lanes on a section of this freeway will have to be closed to undertake an emergency bridge repair that is expected to take 2 hr. The mean free speed of the highway is 60 mi/h and the jam density is 140 veh/mi/ln. If it is estimated that the demand flow on the highway during the emergency repairs is 80% of the capacity, using the deterministic approach, determine: (a) The maximum queue length that will be formed (b) The total delay(c) The number of vehicles that will be affected by the incident(d) The average individual delay
- *The density value was estimated from a segment of NLEX to be 12 veh per km at a speed of 70 kph. 4. What jam density value will yield a typical highway design speed of 100kph Determine the jam density. a) 50 vph b) 40 vph c) 45 vph d) 60 vph 5. What will be corresponding space between vehicles at jam density, if the average length of vehicle is 6 m long. a) 23m b) 28m c) 19m d)25m1) SITUATION. On a specific westbound section of highway, studies show that the speed-density relationship is: It is known that the capacity is 4200 veh/hr and the jam density is 210 veh/km. .What is the density that would give this capacity 136.64 veh/km 417.79 veh/km 336.12 veh/km 215.67 veh/km 2) What is the space-mean speed of the traffic at capacity? A 20.22 kph 18.36 kph 30.74 kph 48.68 kph 3) 3. What is the free-flow speed? 41.78 kph 76.85 kph 39.52 kph D 22.57 kphAverage free flow speed and the jam density observed on a road stretch are 60 km/h and 120 vehicles/km, respectively. For a linear speed-density relationship, the maximum flow on the road stretch (in vehicles/h) is