Roadway Elevation and Slope Concepts

In this video, Todd Horton guides viewers through the process of plotting roadway cross sections. The tutorial covers identifying high and low elevations, plotting these points on a graph, and calculating the slope of the pavement. The video provides a step-by-step approach to plotting two cross sections, explaining the importance of vertical and horizontal scales. It also delves into calculating the pavement cross slope, emphasizing the relationship between vertical and horizontal changes. The tutorial is designed to help viewers understand the fundamentals of cross section plotting and slope calculation.

What are the two stations mentioned for the roadway cross sections?

• 50+40 and 00+40

• 40+50 and 40+00

• 40+00 and 50+50

• 50+00 and 40+50

What is the next whole number above the highest elevations used for plotting?

• 652

• 653

• 654

• 655

At what horizontal scale is the plotting done?

• 1:10

• 1:15

• 1:20

• 1:25

What is the elevation at the centerline of the first cross-section?

• 653.0 feet

• 650.8 feet

• 651.6 feet

• 652.3 feet

What is the total width of the pavement?

• 14 feet

• 56 feet

• 28 feet

• 42 feet

What is the term used for the slope that begins at the edge of the pavement?

• Ditch

• Back slope

• Front slope

• Shoulder

How is the slope expressed in terms of vertical and horizontal change?

• 0.03 feet vertical for 10 feet horizontal

• 0.10 feet vertical for 20 feet horizontal

• 0.05 feet vertical for 1 foot horizontal

• 0.07 feet vertical for 14 feet horizontal

What is the percentage slope calculated in the video?

• 3%

• 6%

• 4%

• 5%

What is the term for the slope beyond the ditch when standing on the pavement?

• Middle slope

• Side slope

• Back slope

• Front slope

What is the difference in elevation used to calculate the slope?

• 0.5 feet

• 0.6 feet

• 0.7 feet

• 0.8 feet