Except when directed by a police officer or traffic-control signal, every driver of a vehicle approaching a stop intersection, indicated by a stop sign, shall stop before entering the crosswalk on the near side of the intersection.  In the event there is no crosswalk, the driver shall stop at a clearly marked stop line before entering the intersection.  If there is no marked stop line, then the driver shall stop at the point nearest the intersecting road where the driver has a view of approaching traffic on an intersecting roadway before entering the intersection.  A driver after having stopped shall yield the right-of-way to any vehicle which has entered the intersection from another highway or road, or which is approaching so close as to constitute immediate hazard, but the driver having so yielded may then proceed and the drivers of all other vehicles approaching the intersection shall yield the right-of-way to the vehicle so proceeding.
(47 O.S. §§ 11-403(b) and 11-703(d))  (`83 Code, § 15-553)  Penalty, see § 71.999