Motor Vehicles Act, 1988
The driver of a motor vehicle shall make such signals and on such occasions as may be prescribed by the Central Government : Provided that the signal of an intention to turn to the right or left or to stop - (a) in the case of a motor vehicle with a right - hand steering control, may be given by a mechanical or electrical device of a prescribed nature affixed to the vehicle; and (b) in the case of a motor vehicle with a left - hand steering control, shall be given by a mechanical or electrical device or a prescribed nature affixed to the vehicle : Provided further that the State Government may, having regard to the width and condition of the roads in any area or route, by notification in the Official Gazette, exempt subject to such conditions as may be specified therein any motor vehicle or class or description of motor vehicles from the operation of this section for the purpose of plying in that are or route. Corresponding Law. - Section 121 corresponds to section 79 of the Motor Vehicles Act, 1939. Objects and Reasons. - Clause 121 specifies that the drivers of motor vehicles including the vehicles fitted with left hand steering should give appropriate signals including mechanical and electrical signals of their intention to turn right or left.