Horizontal curves -definitions

Question	Answer
Tangent points	TP1 and TP2 are the tangent points where the circular curve touches the straights Image: 52e19d69-2738-4014-9fcc-bde8d6cf2ad0 (image/png)
Intersection point	I is the intersection point of the two straights Image: e7354879-6e57-416f-a35b-5a7e21f7dd64 (image/png)
Tangent Distance	TP1–I & TP2-I are the Tangent distance Image: 4afbfb92-76d8-4077-a280-43f43ebfa5fc (image/png)
Circular curve (arc)	TP1–P-TP2 is the circular curve (Arc) between the two tangent points Image: ff3db053-a3bb-4992-89f8-13045e2e71df (image/png)
Circular Curve (arc) contd.	Lc is the length of the circular curve = Arc Length P is the mid-point of the circular curve
Long Chord	S is the mid-point of the long chord PS is Height of Long Chord Image: 64a9f34f-7a4e-4daa-a0fa-64febf26ab28 (image/png)
Deflection angle β	β = Deflection Angle + = right hand curve - = left hand curve Image: 79c0c55a-6ac5-4c58-bc17-f39e05e00e7b (image/png)
Radius	R is the Radius of Curvature of the circular curve Image: 26f4eabb-6fd1-435b-924f-f4ba54980ffb (image/png)
External distance	External Distance = PI Image: 03bb2e5c-bd03-4e00-b054-91991721a550 (image/png)

Resource summary

	Created by rhiannonsian over 10 years ago