what is meant by the word Unit on street signs in Washington, DC.?

Answer 1

The "unit block" of a street in DC is the first block from the quadrant dividing line. The house numbers are single or double digit. The next block is the 100 block, which in most cities is the first block of the numbering system.

For example, the old main post office in DC was at 2 Mass. Ave., NE. It was on the northeast corner of North Capitol Street (the dividing line between east and west) and Massachusetts Avenue. Since it was between No. Capitol and First Street NE, it was in the unit block. The addresses between First Street and Second Street have number in the 100 series.

Answer 2

Dc Street Signs