An aerial picture was taken of a 0.25 mile section of a two-lane rural highway. The...
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An aerial picture was taken of a 0.25 mile section of a two-lane rural highway. The picture shows a total of 140 vehicles. What is the density of the freeway section (vehicles per mile per lane |
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An aerial picture was taken of a 0.25 mile section of a two-lane
rural highway. The...
The right lane of a three (3) lane rural highway is temporary closed for construction. If...
The right lane of a three (3) lane rural highway is temporary closed for construction. If the posted speed of the highway is 55 mph, what is the minimum length of transition to shift vehicles to the inside two lanes.
3. (20 pts) Two aerial photographs were taken 30 seconds apart over one east-bound lane of l-80 n...
3. (20 pts) Two aerial photographs were taken 30 seconds apart over one east-bound lane of l-80 near Grand Island, NE. The following results were recorded. Position from start of road section Vehicle 2000 2300 1700 1200 600 2940 3200 2400 2100 1730 1000 2 3 4 Plot the trajectories of the vehicles on graph paper and compute the average flow (vph), density (veh/mi) and space mean speed (mph) over the 3000 ft length of the lane.
3. (20 pts)...
Principles of transportation engineering The volume at a section of two lane highway is 1500 veh/h......
Principles of transportation engineering
The volume at a section of two lane highway is 1500
veh/h...
DONT FORGET PART B
3. (10 pts) The volume at a section of a two-lane highway is 1500 veh/h in each direction and the density is about 25 veh/mi. A large dump truck is loaded with soil from an adjacent construction site joins the traffic stream and travels at a speed of 10 mi/h for a length of 2.5 mi along the upgrade before...
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...
5. There is a freeway segment and its characteristics are given as below: •A six-lane urban...
5. There is a freeway segment and its characteristics are given as below: •A six-lane urban freeway (3 lanes each direction) •11-ft lanes •3-ft right-shoulder lateral clearance •3% grade •1.2 mile in length •8% of trucks and buses •4% recreational vehicles •Driver population factor (fp): 0.95 •Peak-hour volume in peak direction: 2,500 vehicles •PHF: 0.925 •Interchange density: 1.5 per mile Evaluate the freeway segment by Level-of-Service (LOS) according to the Highway Capacity Manual (Referring to Tables 6-3 ~ 6-10 in...
2. A class 1, 30mile long rural two-lane highway segment is in rolling terrain. Peak demand...
2. A class 1, 30mile long rural two-lane highway segment is in rolling terrain. Peak demand is 900 vph (total for both directions), with a 70:30 directional split, and consists of 20% trucks (no rv's or busses). The PHF is 0.80. There are 80% no passing zones, and the base free-flow speed is 55 mi/h. Lane and shoulder widths width are 11 and 2 ft, respectively. There are 6 access points per mile. a) Estimate the average travel speed in...
A four-lane freeway is located on rolling rural terrain and has two 12-ft lanes in each...
A four-lane freeway is located on rolling rural terrain and has two 12-ft lanes in each direction and no lateral obstructions within 8 ft of the right-hand lane. The traffic stream consists of cars and trucks only (no RVs). A peak-hour volume of 3600 vehicles is observed, with 1000 arriving in the most congested 15-minute period. TRD-0.24 ramps/mi. If any data are missing, adopt default values from Table 3.3 a. What is the PHF? b. What is the density of...
13. A divided rural multi-lane highway with an AADT of 50,000 vehicles per day. A 70...
13. A divided rural multi-lane highway with an AADT of 50,000 vehicles per day. A 70 mph. The peak hour factor is set at 0.8 and the directional factor, D is estimated at 0.8. The highway is required to provide a Level of Service ‘B’. Assuming the highway is to be designed for the thirtieth highest hourly volume (k= .15) during the year Calculate the number of lanes required in each direction Calculate the number of lanes If the highway...
If there are 50 vehicles on a 4000-ft highway lane and the average time headway between...
If there are 50 vehicles on a 4000-ft highway lane and the average time headway between two adjacent vehicles is 2.2 seconds. 3. Calculate traffic density in vehicle/mile (vpm) and average space headway in feet/vehicle (fpv) (1pt) 1) 2) Calculate traffic volume in vehicle/hour (vph). (1pt) 3) Calculate space-mean speed of the traffic on that lane. (1 pt)
A 25-mile-long, 9-yard-wide, two-lane highway (each lane 4.5 yard) is to be paved with a 5...
A 25-mile-long, 9-yard-wide, two-lane highway (each lane 4.5 yard) is to be paved with a 5 cm thick layer of asphalt. A fleet of three dump-trucks is to be employed, each with an empty mass of 20 metric tons and a carrying capacity of 20 m3. Asphalt with a density of 0.72 g/cm3 will be used Determine a) the total volume of asphalt needed in m3 b) the number of dump-truck loads required c) the gross mass of each truck...
The right lane of a three (3) lane rural highway is temporary closed for construction. If the posted speed of the highway is 55 mph, what is the minimum length of transition to shift vehicles to the inside two lanes.
3. (20 pts) Two aerial photographs were taken 30 seconds apart over one east-bound lane of l-80 near Grand Island, NE. The following results were recorded. Position from start of road section Vehicle 2000 2300 1700 1200 600 2940 3200 2400 2100 1730 1000 2 3 4 Plot the trajectories of the vehicles on graph paper and compute the average flow (vph), density (veh/mi) and space mean speed (mph) over the 3000 ft length of the lane.
3. (20 pts)...
Principles of transportation engineering
The volume at a section of two lane highway is 1500
veh/h...
DONT FORGET PART B
3. (10 pts) The volume at a section of a two-lane highway is 1500 veh/h in each direction and the density is about 25 veh/mi. A large dump truck is loaded with soil from an adjacent construction site joins the traffic stream and travels at a speed of 10 mi/h for a length of 2.5 mi along the upgrade before...
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. A class 1, 30mile long rural two-lane highway segment is in rolling terrain. Peak demand is 900 vph (total for both directions), with a 70:30 directional split, and consists of 20% trucks (no rv's or busses). The PHF is 0.80. There are 80% no passing zones, and the base free-flow speed is 55 mi/h. Lane and shoulder widths width are 11 and 2 ft, respectively. There are 6 access points per mile. a) Estimate the average travel speed in...
A four-lane freeway is located on rolling rural terrain and has two 12-ft lanes in each direction and no lateral obstructions within 8 ft of the right-hand lane. The traffic stream consists of cars and trucks only (no RVs). A peak-hour volume of 3600 vehicles is observed, with 1000 arriving in the most congested 15-minute period. TRD-0.24 ramps/mi. If any data are missing, adopt default values from Table 3.3 a. What is the PHF? b. What is the density of...
If there are 50 vehicles on a 4000-ft highway lane and the average time headway between two adjacent vehicles is 2.2 seconds. 3. Calculate traffic density in vehicle/mile (vpm) and average space headway in feet/vehicle (fpv) (1pt) 1) 2) Calculate traffic volume in vehicle/hour (vph). (1pt) 3) Calculate space-mean speed of the traffic on that lane. (1 pt)
A 25-mile-long, 9-yard-wide, two-lane highway (each lane 4.5 yard) is to be paved with a 5 cm thick layer of asphalt. A fleet of three dump-trucks is to be employed, each with an empty mass of 20 metric tons and a carrying capacity of 20 m3. Asphalt with a density of 0.72 g/cm3 will be used Determine a) the total volume of asphalt needed in m3 b) the number of dump-truck loads required c) the gross mass of each truck...
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