Reversed Curves

Question 1

Consists of two or more consecutive simple curves having different radius, but
whose centers lie on the opposite sides of
the tangent

Answer 1

Reversed Curves

Question 2

The point of the common tangent where the two curves join

Answer 2

Point of Reversed Curvature (PRC)

Question 3

Point of tangency where the curve leaves the tangent

Answer 3

Point of Curvature (PC)

Question 4

Point of tangency where the curve meets the other tangent

Answer 4

Point of Tangency (PT)

Question 5

Common point of tangency of the two joined simple curves

Answer 5

Point of Reversed Curvature (PRC)

Question 6

Subtended angle of the first curve

Answer 6

Central Angle of the First Simple Curve (I1)

Question 7

Subtended angle of the second curve

Answer 7

Central Angle of the Second Simple Curve (I2)

Question 8

Distance from PC to V1

Answer 8

Back Tangent (T1)

Question 9

Distance from PT to V2

Answer 9

Forward Tangent (T2)

Question 10

Curve length from PC to PT

Answer 10

Length of the Reversed Curvature (LRC)

Question 11

Formula of LRC

Answer 11

LRC = Lc1 +Lc2

Question 12

Formula of Sta PC

Answer 12

Sta PC = Sta V1 - t1

Question 13

Formula of Sta PRC

Answer 13

Sta PRC = Sta PC + Lc1

Question 14

Formula of Sta PT

Answer 14

Sta PT = Sta PRC + Lc2

Question 15

Types of Reversed Curves

Answer 15

1. Parallel Tangents Reversed Curves
2. Converging Tangents Reversed Curves

Question 16

The back and the forward tangents of
the reversed curve observes a perpendicular distance between them making the tangents parallel to one
another

Answer 16

Parallel Tangents Reversed Curves

Question 17

Extending the alignment of the back tangent meeting the projection of the forward tangent forming the angle of convergence

Answer 17

Converging Tangents Reversed Curves

Question 18

The point of intersection of
the extended tangents

Answer 18

Point of
Convergence (A)