Sometimes street renaming can be controversial, because of antipathy toward the new name, the overturning of a respected traditional name, or confusion from the altering of a familiar name useful in navigation. A proposal in 2005 to rename 16th Street, N.W., in Washington, D.C., "Ronald Reagan Boulevard" exemplified all three. Issues of familiarity and confusion can be addressed by the street sign showing the current name and, in smaller writing, the old name. One compromise when the issue is more political can be "co-naming", when the old name is fully retained but the street is also given a second subsidiary name, which may be indicated by a smaller sign underneath the 'main' name. (See section below on "Multiple names for a single street".)