Diamond shaped warning signs includes modern (after 1971) symbol signs and other signs that have been used since 1948. Signs designed on CAD to Federal Standards, then printed on plastic for very easy assembly. Each set includes signs as illustrated and scale posts. You cut out the signs you want, attach to the scale post, and install on your layout. These signs will make your layout more realistic. Highway and railroad right of way signs really add the finishing touch to your layout. Try some today!