The point where the road alignment changes from a tangent to a curve is known as _________
Defining Road Alignment Transition Points
In road engineering, the alignment refers to the horizontal path of the road. This path typically consists of straight sections, known as tangents, and curved sections used to change direction.
The specific point where the road's geometry changes from a straight tangent alignment to a circular curve is a key element in design. This transition point is formally termed the Point of Curve (PC).
Understanding Key Road Alignment Points
To clarify, consider these related definitions:
- Tangent: A straight segment of the road alignment.
- Point of Curve (PC): The exact location where the alignment begins to curve away from the tangent.
- Point of Intersection (PI): The theoretical point where the forward tangent and the backward tangent intersect if they were extended straight.
- Point of Tangency (PT): The point where the curve finishes, and the alignment transitions back to a straight tangent.
The question asks for the point where the road alignment changes from a tangent to a curve. This definition matches the Point of Curve.
Important Questions from Curves
‘Point of curve’ of a simple circular curve is
If chainage of PC is 40000 m and length of transition curve is 220 m, then the chainage of junction of transition curve is______.
In a compound curve construction, if the length of the first curve is 268.3m and chainage at point of curve is 623.3m. The chainage at point of compound curvature is_______.
Calculate the length (m) of tangent of a 5-degree curve, if the deflection angle is 60 degree.
What is the value of mid-ordinate, If the radius of a simple circular curve – 560 m and the deflection angle = 120°
