The following highways are numbered 399:
Preceded by 398 | Lists of highways 399 | Succeeded by 400 |
U.S. Route 399 was a U.S. Highway in the state of California that ran from Ventura to Bakersfield. It was established in 1934 and decommissioned in 1964, as it was only 124 miles (200 km) long, less than the 300-mile (480 km) minimum that the American Association of State Highway and Transportation Officials (AASHTO) set as the threshold for U.S. Highways. It has been replaced with a segment of State Route 33 (SR 33), all of SR 119, and a segment of SR 99.
New York State Route 399 (NY 399) was a state highway located within the town of Johnstown in Fulton County, New York, in the United States. It served as a connector between NY 29 in the hamlet of Cork and NY 29A in the hamlet of Meco. After being proposed in 1931, the route was assigned in April 1935. The designation was removed by the early 1960s, but a section remained a state highway until April 1, 1980, when it transferred between the state of New York and Fulton County.