Transition curve |
To minimise discomfort arising out of the sudden change in curvature at the junction of a tangent and a curve, a special type of curve is provided in between for gradual change from the back tangent to the circular curve and again from the circular curve to the forward tangent. The horizontal curve having varying radius is known as transition curve. A transition curve is also provided between two branches of a compound curve or a reverse curve so that the changes in curvature are gradual. |