Section 4(1)(c) in Nehru Outer Ring Road, Hyderabad (Toll) Rules, 2012
(c)"Truck" or "Bus" means any mechanical vehicle with a gross vehicle weight exceeding twelve thousand kilo grams but less than Twenty thousand kilo grams or the registered passenger carrying capability as specified in the certificate of registration issued under the Motor Vehicles Act, 1988 exceeds Thirty two excluding the driver.