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Vertical Curve Variables
transpo test 2
18
Engineering
Undergraduate 2
11/04/2008

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Cards

Term
VPI =
Definition
vertical point of intersection
Term
VPC =
Definition
vertical point of curvature
Term
VPT =
Definition
Vertical point of tangency
Term
G1 =
Definition
Grade of initial tangent
Term
G2 =
Definition
grade of final tangent
Term
L =
Definition
length of vertical curve
Term
A =
Definition
algebraic difference in grade between g1 and g2
Term
x =
Definition
horizontal distance to point on curve
Term

Ex =

Definition
elevation on point on curve located at distance x from VPC
Term
xm =
Definition
location of min/max point on curve, measured from VPC
Term
Em =
Definition
elevation of min/max point on curve at distance xm from VPC
Term
E =
Definition
external distance = middle ordinate
Term
y =
Definition
offset of curve from initial grade
Term
EPI =
Definition
Elevation of VPI
Term
EPC =
Definition
elevation of VPC
Term

EPT =

Definition
elevation of VPT
Term
g1 =
Definition

grade of initial tangent in percent

Term
g2 =
Definition
grade of final tangent in percent
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