Horizontal curves -definitions

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Degree level Surveying & Highway Design (Horizontal curves) Flashcards on Horizontal curves -definitions, created by rhiannonsian on 29/03/2015.
rhiannonsian
Flashcards by rhiannonsian, updated more than 1 year ago
rhiannonsian
Created by rhiannonsian over 9 years ago
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Resource summary

Question Answer
Tangent points TP1 and TP2 are the tangent points where the circular curve touches the straights
Intersection point I is the intersection point of the two straights
Tangent Distance TP1–I & TP2-I are the Tangent distance
Circular curve (arc) TP1–P-TP2 is the circular curve (Arc) between the two tangent points
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
Deflection angle β β = Deflection Angle + = right hand curve - = left hand curve
Radius R is the Radius of Curvature of the circular curve
External distance External Distance = PI
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