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2 cards from this section. Quick, good the night before a test.
What is the formula to calculate the length of a vertical curve?
Consider the difference in grades and the rate of change.
If point A has an RL of 350 m and is on a +1% grade, what is the RL at point O, 180 m away?
Calculate the drop using the grade.
What formula is used to determine the length of a vertical curve?
Remember the relationship between grades and length.
The RL of a point is lower if it has a negative grade.
Think about the meaning of a negative grade.
Given a grade change from +1% to -3% over a 600 m stretch, calculate the length of the vertical curve and the RL for points located 120 m before and after the intersection.
Can you apply the grade and distance effectively?
A vertical curve connects two grades of +0.3% and -0.9%. Given the RI at the intersection is 310.5 m, calculate the RL at the midpoint of the curve with a length of 180 m.
Break down how the elevation affects the drop specifically.
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