Horizontal circular curve
No transition spiral.
Method
T = R tan(Δ/2), L = RΔ in radians. Worked case: 200 m radius, 40° deflection, tangent 72.79 m, arc 139.63 m.
Logic: how this figure is built.
Last checked 2 October 2026. See the disclaimer.
No transition spiral.
T = R tan(Δ/2), L = RΔ in radians. Worked case: 200 m radius, 40° deflection, tangent 72.79 m, arc 139.63 m.
Logic: how this figure is built.
Last checked 2 October 2026. See the disclaimer.