The following highways are numbered 399:
 | This list is incomplete; you can help by adding missing items. (August 2008) |
Canada
Japan
United States
U.S. Route 399 (former)- Arkansas Highway 399
- Florida State Road 399
- Louisiana Highway 399
- Nevada State Route 399
- New York State Route 399 (former)
- Tennessee State Route 399
- Texas State Highway Spur 399
- Virginia State Route 399
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.svg/1280px-NY-399_(1955).svg.png)
| Preceded by 398 |
Lists of highways 399 |
Succeeded by 400 |
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