(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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Similar questions

A four-lane freeway (two lanes on each direction) is located on mountainous terrain with 11-ft lanes, a 5-ft right-side shoulder, and a 3-ft left-side shoulder, and a 60- mph design speed. The freeway currently operates at capacity during the peak hour. If an additional 11-ft lane is added, and all other factors stay the same, what will the new level of service be?
SOLVE FOR G ONLY. Complete solution.
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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).