(1) A person driving a mechanically propelled vehicle on a road must stop the vehicle on being required to do so by a constable in uniform or a traffic officer.
(2) A person riding a cycle on a road must stop the cycle on being required to do so by a constable in uniform or a traffic officer.
(3) If a person fails to comply with this section he is guilty of an offence.
(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .