When overtaking another vehicle proceeding in the same direction, the driver shall first give audible warning of his intention to pass and shall then pass at a safe distance when the left side is clearly visible and free from oncoming traffic for a sufficient distance. The driver of the vehicle being passed shall move to the right a sufficient distance to allow passing and shall not increase his speed until completely passed by the overtaking vehicle. No vehicle shall pass another vehicle in any street intersection. (Prior code § 9-110)