1. Turning Radius as per Indian Standards (IRC/IS Codes) In India, road geometric standards are given mainly by IRC, not IS.Relevant codes: A. IRC Standard Vehicle Turning Radius Vehicle Type Standard Turning Radius (IRC) Passenger Car 6.0 m Light Commercial Vehicle (LCV) 7.5 m Bus 12.0 m Single-Unit Truck 12.5 m Semi-Trailer (Articulated Truck) 14–15 Read more