Section 31
SEC. 31. When meeting or overtaking persons or vehicles every operator of a motor vehicle shall give timely notice and warning of his proximity by sounding his horn. Such warning should be sounded when the operator, having regard to the speed at which he is traveling, is still a safe distance from the person or vehicle about to be met or overtaken and before the motor vehicle has drawn opposite to or abreast of such person or vehicle, the intent of this provision being the requirement of a warning within such a distance that the same will be clearly heard and not within such a short distance that, owing to its nearness and suddenness, it is likely to cause fright or to startle the person, horse, or other animal which is being met or overtaken.