1993 Cadillac DeVille Owner's Manual - Page 184
1993 Cadillac DeVille Manual
Page 184 highlights
A TRIANGULAR sign also is used on two-lane roads to indicate NO a PASSING ZONE. This sign will be on theleft side of the roadway. KEEP ONLY RIGHT LEFT OR THROUGH TURN RIGHT RECTANGULAR (square or oblong) signs showspeed limits, parking regulations, give directions, and such information as distances to cities.
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