As per IRC 37, the maximum volume of traffic (in a vehicle per hour) entering from all legs of the rotary intersection can be handled efficiently is

Explanation:

• IRC 37 states that rotary (or roundabout) intersections can handle up to around 3000 vehicles per hour entering from all approaches efficiently.

• When entering traffic exceeds this volume, the rotary may experience congestion, increasing delays and reducing safety.

• For traffic volumes higher than 3000 vehicles per hour, other intersection designs like signalized intersections or flyovers are preferred.

• Proper design and size of the rotary are important to maintain smooth traffic flow at these volumes.

 Additional Information

Rotary (or roundabout) is a circular intersection where traffic moves around a central island in one direction. It controls traffic flow without the need for signals or stop signs.

• Vehicles entering the rotary give way to traffic already circulating, improving continuous flow and reducing delays.

• Rotaries reduce conflict points compared to traditional intersections, lowering the risk of severe accidents.

• They are suitable for moderate traffic volumes and help in traffic calming by slowing vehicle speeds.

• Proper design of entry angles, circulating lane width, and signage is essential for safety and efficiency.

• Rotaries can handle different traffic volumes but have a maximum capacity beyond which other intersection types are better.