(a) Preferential right-of-way at an intersection may be indicated by stop signs or yield signs as authorized in Section 15-108 of this act.

(b) Every stop sign and every yield sign shall be erected as near as practicable to the nearest line of the crosswalk on the near side of the intersection or, if there is no crosswalk, then as near as practicable to the nearest line of the intersecting roadway, however such yield signs shall not be erected upon the approaches of but one of the intersecting streets.

(c) Every stop sign shall bear the word “Stop”. Every yield sign hereafter erected or replaced shall bear the word “Yield”. Every stop sign and every yield sign shall at nighttime be rendered luminous by internal illumination, or by a floodlight projected on the face of the sign, or by efficient reflecting elements in or on the face of the sign.

(d) Except when directed to proceed 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 or, in the event there is no crosswalk, shall stop at a clearly-marked stop line, but if none, then at the point nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway before entering the intersection.

(e) The driver of a vehicle approaching a yield sign if required for safety to stop shall stop before entering the crosswalk on the near side of the intersection or, in the event there is no crosswalk, at a clearly-marked stop line, but if none, then at the point nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway.