Section 4. When aboub to ,stop, _

4. When aboub to ,stop, a, driver shall rake his right forearm vertically utside of a.nd to the rlght of the vehicle, palm to tho front. 6. When a driver wishes to indica.te to the driver of a vehicle behind him hat he desire8 that driver to overtake him, he shall oxtend his right arm and a.nd horizontally outside of and to the right of the vehicle and shall swing the rm backwards and forwards in a semi-circular motion. we