Practice Question: Elevation Across a Vertical Curve
NCEES Civil PE Specification VI.B.: Basic vertical curve elements
Problem
You are speeding through Malibu, California in your brand-new Tesla when you come upon a vertical sag curve in the road. As you enter the vertical curve, you notice a jogger approximately 6 feet in height passing the STA 82+00 road marker.
Given the following information and figure, determine the elevation at the top of the jogger’s head:
• BVC at STA 80+00
• EVC at STA 82+50
• BVC Elevation is 968.5 ft
Select an Answer:
CORRECT 😃
INCORRECT 😟
% Students Correctly Answered:
53.9%
Solution
Answer: B) 972.1 ft
Entry Grade:
$$ G_1=\ -0.03$$
Exit Grade:
$$ G_2=0.015 $$
Length of Curve:
$$ L=8250\ ft\ -\ 8000\ ft\ =\ 250\ ft $$
