The operator of any vehicle overtaking another vehicle approaching from the rear shall give way to the right in favor of the overtaking vehicle on suitable and audible signal being given by the driver of the overtaking vehicle and shall not increase the speed of his or her vehicle until completely passed by the overtaking vehicle. No person shall drive any vehicle at any unnecessarily slow rate of speed so as to hinder and retard traffic.
(Ord. passed - -) Penalty, see § 70.99