.-The driver of a motor vehicle shall not pass a vehicle travelling in the same direction as himself,-(a)if his passing is likely to cause inconvenience or danger to other traffic proceeding in any direction;(b)if he is near a point, a bend or corner or a hill or other obstruction of any kind that renders the road ahead not clearly visible;(c)if he knows that the driver who is following him has begun to overtake him;(d)if the driver ahead of him has not signalled that he may be overtaken.
