1993 Pontiac Firebird Owner's Manual - Page 132
1993 Pontiac Firebird Manual
Page 132 highlights
h ISTOI I L BLUE signs with white letters show motorists' services. A V YIELD 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 TRIANGLE, pointed downward, indicates YIELD. It assigns the right-of-way to traffic on certain approaches to an intersection. ... A 1 SWIMMING END DIVIDED HIGHWAY CANOEING BROWN signs point out recreation areas or points of historicor cultural interest. A DIAMOND-shaped sign isa warning of something ahead- for example, the end of a divided highway, a curve, steep hill, soft shoulder, or a narrow bridge. A TRIANGULAR sign also used on is two-lane roads to indicate a NO PASSING ZONE. This sign will be on the left side of the roadway.