DONT FORGET PART BHomework Answers
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Principles of transportation engineering
The volume at a section of two lane highway is 1500
veh/h......
---------------- civil engineering ----------------------- capacity 1500 veh/h free flow speed 60 km/hr on a one lane...
---------------- civil engineering ----------------------- capacity 1500 veh/h free flow speed 60 km/hr on a one lane traffic road, there exists a railway grade grossing at the end of the road section. on one day, a train is passing through the crossing and the gate is cloased. consequently the vehciles are required to stop behind the gate while the train is passing. three min later the gate opens and the vehicles leave rigth away. traffic flow in normal traffic conditions is...
Problem #2 A section of a six-lane highway (3 in each direction) with a two-way-left-turn lane...
Problem #2 A section of a six-lane highway (3 in each direction) with a two-way-left-turn lane (TWLTL) is being designed. Determine the level of service if the following data are applicable to this section. Traffic Data: • • • Directional design hour volume = 3600 veh/h (all are passenger cars) Peak-Hour-Factor (PHF) = 0.94 Base Free-Flow-Speed (FFS) = 55 mi/h Geometric data: • • • • • Urban setting Rolling terrain Lane width = 11 ft Shoulder width = 4...
Please clearly show all steps. Answers are in red. On a specific westbound section of highway,...
Please clearly show all steps. Answers are in red.
On a specific westbound section of highway, studies show that the speed-density relationship is: 1. 3.6 It is known that the capacity is 3600 veh/h and the jam density is 215 veh/mi. a. What is the density at the point of maximum flow? 140.7 veh/mi b. What is the spacing between vehicles at this density? 19.20 ft/veh Assume an average vehicle length of 220 inches c. What is the space-mean speed...
A multilane highway has four lanes (two lanes in each direction) and a measured free-flow speed...
A multilane highway has four lanes (two lanes in each direction) and a measured free-flow speed of 55 mi/h. One upgrade is 3% and 2 miles long. Trucks are not permitted on the highway, but there are 5% buses in the directional peak hour volume of 1900 vehicles with a peak hour factor of 0.80. What is the calculated density of the highway, assuming familiar drivers are in the traffic stream?
Q3. A Class I two-lane highway has a base free-flow speed of 110 km/h. Lane width...
Q3. A Class I two-lane highway has a base free-flow speed of 110 km/h. Lane width is 3.35 m and shoulder width is 0.6 m. There are 5 access points per km. The roadway is located in rolling terrain with 40% no-passing zones. The two-way traffic volume is 600 veh/hr with PHF = 0.86. The directional split is 60/40. Traffic includes 8% trucks and 2% recreational vehicles. Determine the level of service (LOS).
The traffic on a two-way two-lane highway is assumed to follow Greenberg model. The average headway...
The traffic on a two-way two-lane highway is assumed to follow Greenberg model. The average headway at Capacity is 1.9 seconds while the average spacing at jam conditions is 9 meters. At 9:00 AM on a typical weekday, two platoons were travelling on the highway in the eastbound direction. The length of the first platoon is 3 km and the average vehicle speed in this platoon is 62 km/h. The second platoon is a long platoon that starts directly to...
4 The following 15-minute volumes were obtained on an eastbound lane of a highway. (a) If...
4 The following 15-minute volumes were obtained on an eastbound lane of a highway. (a) If the capacity of the lane in that direction is 1820 vehicles per hour, would there be queuing delay? Show all the steps to the solution of the problem. (b) Compute the peak hour factor Time period Volume (vehicles) 7:00-7:15 7:15-7:30 7:30-7:45 7:45-8:00 410 459 289 5. A section of highway has the following flow-density relationship in metric units (that is, density is in vehicles...
A four-lane freeway with two lanes in each direction has a measured free-flow speed of 55 mi/hr. ...
A four-lane freeway with two lanes in each direction has a measured free-flow speed of 55 mi/hr. The peak-hour factor is 0.80 and there are 6% trucks, 2% buses, and 2% recreational vehicles in the traffic stream. One upgrade is 5% and 0.5 miles long. A traffic engineer has determined that the freeway is operating at capacity on this upgrade during the peak hour. If the peak-hour traffic volume is 3900 vehicles, what value for the driver population adjustment factor...
2. Studies show that on a specific northbound section of a highway the speed-density relationship is:...
2. Studies show that on a specific northbound section of a highway the speed-density relationship is: u= u(1-(k/k;) -5) The highway's capacity is 3800 veh/h and the jam density is 140 veh/mi. What is the speed of the traffic at capacity, and what is the free-flow speed?
Exercise 1 [I8 pts]. Two lanes of a three-lane highway are closed because of road works...
Exercise 1 [I8 pts]. Two lanes of a three-lane highway are closed because of road works on a 2 km long segment. A detector placed on one single lane in the undisturbed zone upstream the road works detects a flow of 2,000 veh/h and an average speed of 100 km/h. A second detector placed on one of the two lanes just upstream the roadwork zone detects a flow of 800 veh/h and an average speed of 40 km/h. We observe...
Problem #2 A section of a six-lane highway (3 in each direction) with a two-way-left-turn lane (TWLTL) is being designed. Determine the level of service if the following data are applicable to this section. Traffic Data: • • • Directional design hour volume = 3600 veh/h (all are passenger cars) Peak-Hour-Factor (PHF) = 0.94 Base Free-Flow-Speed (FFS) = 55 mi/h Geometric data: • • • • • Urban setting Rolling terrain Lane width = 11 ft Shoulder width = 4...
Please clearly show all steps. Answers are in red.
On a specific westbound section of highway, studies show that the speed-density relationship is: 1. 3.6 It is known that the capacity is 3600 veh/h and the jam density is 215 veh/mi. a. What is the density at the point of maximum flow? 140.7 veh/mi b. What is the spacing between vehicles at this density? 19.20 ft/veh Assume an average vehicle length of 220 inches c. What is the space-mean speed...
Q3. A Class I two-lane highway has a base free-flow speed of 110 km/h. Lane width is 3.35 m and shoulder width is 0.6 m. There are 5 access points per km. The roadway is located in rolling terrain with 40% no-passing zones. The two-way traffic volume is 600 veh/hr with PHF = 0.86. The directional split is 60/40. Traffic includes 8% trucks and 2% recreational vehicles. Determine the level of service (LOS).
The traffic on a two-way two-lane highway is assumed to follow Greenberg model. The average headway at Capacity is 1.9 seconds while the average spacing at jam conditions is 9 meters. At 9:00 AM on a typical weekday, two platoons were travelling on the highway in the eastbound direction. The length of the first platoon is 3 km and the average vehicle speed in this platoon is 62 km/h. The second platoon is a long platoon that starts directly to...
4 The following 15-minute volumes were obtained on an eastbound lane of a highway. (a) If the capacity of the lane in that direction is 1820 vehicles per hour, would there be queuing delay? Show all the steps to the solution of the problem. (b) Compute the peak hour factor Time period Volume (vehicles) 7:00-7:15 7:15-7:30 7:30-7:45 7:45-8:00 410 459 289 5. A section of highway has the following flow-density relationship in metric units (that is, density is in vehicles...
2. Studies show that on a specific northbound section of a highway the speed-density relationship is: u= u(1-(k/k;) -5) The highway's capacity is 3800 veh/h and the jam density is 140 veh/mi. What is the speed of the traffic at capacity, and what is the free-flow speed?
Exercise 1 [I8 pts]. Two lanes of a three-lane highway are closed because of road works on a 2 km long segment. A detector placed on one single lane in the undisturbed zone upstream the road works detects a flow of 2,000 veh/h and an average speed of 100 km/h. A second detector placed on one of the two lanes just upstream the roadwork zone detects a flow of 800 veh/h and an average speed of 40 km/h. We observe...
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