1993 Oldsmobile Bravada Owner's Manual - Page 121

Shape of Road Signs The shape of the sign will tell you something, too. An octagonal (eight-sided) sign means Stop. It is always red with white letters. A diamond-shaped sign is a warning of something ahead-for example, a curve, steep hill, soft shoulder, or a narrow bridge. Brown signs point out recreation areas or points of historic or cultural interest. I I A triangle, pointed downward, indicates Yield. It assigns the right of way to traffic on ce~rtain approaches to an intersection. A triangular sign also is used on twolane roads to indicate a no passing zone. This sign will be on the left side of the roadway.