# Highways Horizontal Curve Calculator – Transition between two tangent Strips of roadway

Along with elevation point vertical curve horizontal curve is second important factor in highway design, these curves are semicircles that provide constant turning rate to driver, compute this using this online calculator.

## Highways Horizontal Curve

### To calculate Highways Horizontal Curve :

• Intersection Angle

• Degree of Curve

%

• Point of Intersection

%

•

### Results:

• Tangent

• Length

• External

• Long Chord

• Point of curve

• Point of Tangent

Formula:

R = 5729.58 / D
T = R * tan ( A/2 )
L = 100 * ( A/D )
LC = 2 * R *sin (A/2)
E = R ( (1/(cos (A/2) ) ) - 1 ) )
M = R ( 1 - cos (A/2) )
PC = PI - T
PT = PC + L

Where,

D = Degree of Curve, Arc Definition

1° = 1 Degree of Curve

2° = 2 Degrees of Curve

P.C. = Point of Curve

P.T. = Point of Tangent

P.I. = Point of Intersection

A = Intersection Angle, Angle between two tangents

L = Length of Curve, from P.C. to P.T.

T = Tangent Distance

E = External Distance

L.C. = Length of Long Chord

M = Length of Middle Ordinate

c = Length of Sub-Chord

k = Length of Arc for Sub-Chord

d = Angle of Sub-Chord

Along with elevation point vertical curve horizontal curve is second important factor in highway design, these curves are semicircles that provide constant turning rate to driver, compute this using this online calculator.