| This article is part of the highway renumbering series. | |
|---|---|
| Alabama | 1928, 1957 |
| Arkansas | 1926 |
| California | 1964 |
| Colorado | 1953, 1968 |
| Connecticut | 1932, 1963 |
| Florida | 1945 |
| Indiana | 1926 |
| Iowa | 1926, 1969 |
| Louisiana | 1955 |
| Maine | 1933 |
| Massachusetts | 1933 |
| Minnesota | 1934 |
| Missouri | 1926 |
| Montana | 1932 |
| Nebraska | 1926 |
| Nevada | 1976 |
| New Jersey | 1927, 1953 |
| New Mexico | 1988 |
| New York | 1927, 1930 |
| North Carolina | 1934, 1937, 1940, 1961 |
| Ohio | 1923, 1927, 1962 |
| Pennsylvania | 1928, 1961 |
| Puerto Rico | 1953 |
| South Carolina | 1928, 1937 |
| South Dakota | 1927, 1975 |
| Tennessee | 1983 |
| Texas | 1939 |
| Utah | 1962, 1977 |
| Virginia | 1923, 1928, 1933, 1940, 1958 |
| Washington | 1964 |
| Wisconsin | 1926 |
| Wyoming | 1927 |
Routes of the original system as laid out in 1927; realignments and additions (whether realized or not) in pink
In 1927, New Jersey's state highways were renumbered. The old system, which had been defined in sequence by the legislature since 1916, was growing badly, as several routes shared the same number, and many unnumbered state highways had been defined. A partial renumbering was proposed in 1926, but instead a total renumbering was done in 1927.
Some amendments were made in 1929, including the elimination of Route 18N (by merging it into Route 1), and the addition of more spurs, as well as Route 29A, but the system stayed mostly intact until the 1953 renumbering.