(PLEASE USE FIGURE 14.5 TO ANSWER THE QUESTION) A consecutive upgrade consists of two sections, the first of 2 percent grade and 5000 ft long, and the second of 6 percent grade and 5000 ft long. Trucks comprise 10 percent of traffic. And recreational vehicles comprise 6 percent. Determine:the equivalent gradethe PCEs Speed (mi/h)601%502%40-3%4%305%6%20207%8%10T235678910Length in Thousands of FeetFigure 14.5: Performance of a Typical Truck on Grades(Source: Used with permission of Transportation Research Board, National Research Council, Highway Capacity Manual, December2000, Exhibit A23-2, p. 23-30.)

Both grades span 4000 ft.Begin by dropping a vertical line from the 4000 ft mark to intersect the 2%…

Speed (mi/h) 60 1% 50 2% 40 -3% 4% 30 5% 6% 20 20 7% 8% 10 T 2 3 5 6 7 8 9 10 Length in Thousands of Feet Figure 14.5: Performance of a Typical Truck on Grades (Source: Used with permission of Transportation Research Board, National Research Council, Highway Capacity Manual, December 2000, Exhibit A23-2, p. 23-30.)

Speed (mi/h) 60 1% 50 2% 40 -3% 4% 30 5% 6% 20 20 7% 8% 10 T 2 3 5 6 7 8 9 10 Length in Thousands of Feet Figure 14.5: Performance of a Typical Truck on Grades (Source: Used with permission of Transportation Research Board, National Research Council, Highway Capacity Manual, December 2000, Exhibit A23-2, p. 23-30.)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The predicted traffic mix of a proposed four-lane urban non-interstate freeway: Passenger cars (4.44kN/axle) = 65% 2-axle single unit trucks (22.2kN/axle) = 24% 2-axle single unit trucks (40kN/axle) = 6% 3-axle or more single-unit trucks (100kN/axle) = 3% 3-axle or tractor semitrailers and combinations (90kN/axle) = 2% The projected AADT during the first year of operation is 4000 (in both directions). If the traffic growth rate is estimated at 4%, the percent of the traffic on the design lane is 43%, pt =2.5, and SN =3, calculate the design ESAL at the design life of 25 years.
A rural 4-lane highway is to be built between A and B. Select the binder performance grade to meet the Superpave criteria for a reliability level of 98%, given the following information about the project: Latitude = 46.77 Tair (max) (Seven-day average high air temperature) = 33.1 oC Standard deviation of the seven-day high air temperature = 1.8 oC Tair(min) (1-day minimum air temperature) = -21.3 oC Standard deviation of the 1-day minimum air temperature = 3.3 oC High pavement design temp. T20 = (Tair-0.00618Lat2+0.2289Lat+42.2)(0.9545)-17.78
SOLVE FOR G ONLY. Complete solution.
Q7. A 25 miles of gravel road require reshaping and leveling. You estimate that a motor grader will require two passes at 3 mph, two passes at 4 mph, and two pass at 5 mph to accomplish the work. How many grader hours will be required for this work if the job efficiency factor is 0.8?
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A four-lane rural freeway segment has a 510 m grade length of 2% upgrade followed by a 630 m grade length of 3%. The freeway has 3.4-m lane, 1.5m left-shoulder lateral clearances and interchanges spaced at every 25 km. During the peak hour, there are 6% trucks, 2% buses, 2% recreational vehicles and the rest are passenger cars. Driver population adjustment is determined to be 0.90, peak hour factor is 0.90 and the BFFS is 110 km/h. At present, the freeway operates at capacity during the peak hour in the direction in question. If an additional 3.4 m lane is introduced, and all other factors stay the same, what will be the new level of service?
A long segment of suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 vehicles per hour with 15% trucks (standard mix), how many lanes will be needed on the (A.) Upgrade, (B.) Downgrade, (C.) Level terrain segment to provide for level of service C? Lane widths and lateral clearances may be assumed to be 12 feet and 6 feet, respectively. Ramp density is expected to be 1.0 ramps per mile. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.
Step by step solutionProblem 3: A four-lane freeway (two lanes in each direction) operates at capacity during the peak hour. It has 11-ft lanes, 5-ft shoulders, and there are 3 ramps within 3 miles upstream of the segment midpoint and 3 ramps within 3 miles downstream of the segment midpoint. The freeway is on rolling terrain and has 10% heavy vehicles with a PHF of 0.9. It is known that 15% of the AADT occurs in the peak hour and the directional factor is 0.7. Determine: (a) Heavy vehicle adjustment factor(b) Free-flow speed(c) Capacity(d) Volume-to-capacity ratio(e) Density and LOS(f) AADT(g) What is the highest possible value of the heavy vehicle adjustment factor? (h) If the volume exceeds capacity, what is the LOS? Note: No need to show calculations for (g) and (h).
From the traffic counting in 2020, the average commercial vehicle per day is 500 (10% commercial vehicle) and the traffic growth rate is estimated at 5%. A pavement needs to be designed for 15 years and is expected to open for the public in 2022. Using ATJ 5/85 method, estimate the total number of vehicles per direction during the first year of service. * 100740 213669 O 1108240 O 2173824