|The eight sided (octagonal) red sign means make a FULL STOP, before proceeding any further (Figure 1.1). As we will reiterate a few times throughout the course, you should always stop behind the white limit line . If there's no limit line, stop at the corner, or where you are not obstructing oncoming traffic. The California Vehicle Code says that if there is no line, a proper stop is at the entrance of the intersecting roadway (rather than already in the roadway). On a divided highway, stop signs are for vehicles that are crossing or turning onto the highway.