Horizontal road curve: setting out

Set the radius, deflection angle and design speed to see the curve elements and check the radius.

Works in metric or imperial units.

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Questions students ask

What is superelevation?

Banking the road towards the inside of the curve so part of the centripetal force comes from the road surface.

What formula does it use?

T = R tan(Δ/2); L = RΔ (radians); R_min = V²/(127(e + f)).

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