Calculator for Rotary On intersections

🚦 Advanced Rotary Design Calculator (IRC:65)

🔁 Rotary Geometric Inputs

Entry Width (We) in m (Recommended: 5.5 – 10 m): Exit Width (Wx) in m (Recommended: ≥ We): Weaving Length (L) in m (Recommended: 4W – 8W): Proportion of Weaving Traffic (p) (IRC: 0.4 – 1.0): Inscribed Circle Diameter (ICD) in m (IRC: 40 – 120 m): Entry Radius (Re) in m (IRC: 15 – 30 m): Exit Radius (Rx) in m (IRC: 20 – 40 m): Entry Deflection Angle (degrees) (IRC: 60° – 90°):

🚗 Traffic Volume (PCU/hr) at Each Approach

Leg 1:

Leg 2:

Leg 3:

Leg 4: