Objective Question & Answer

(Traffic volume < 3000 vehicles/hour):  Correct. According to Indian Roads Congress (IRC)

guidelines, a traffic rotary operates at its highest efficiency when the total volume of vehicles

entering from all intersecting roads is between 500 and 3000 vehicles per hour. When traffic

exceeds 3000 vehicles per hour, rotaries often face severe congestion, making signalized

intersections a better choice.

(Total right turning traffic is very high): Correct. Rotaries are ideally suited for intersections

where a substantial percentage of traffic turns right (typically exceeding 30% of the total

intersecting volume). This layout handles right-turning traffic seamlessly without forcing

vehicles to stop, eliminating the complex signal phases required at typical signalized

intersections