| 释义 |
- Canada
- China
- Japan
- United States
The following highways are numbered 312: Canada- Manitoba Provincial Road 312
- Nova Scotia Route 312
- Prince Edward Island Route 312
- Saskatchewan Highway 312
China- China National Highway 312
JapanUnited States- U.S. Route 312 (former)
- Arkansas Highway 312
- Florida State Road 312
- Georgia State Route 312 (former)
- Indiana State Road 312
- Kentucky Route 312
- Louisiana Highway 312
- Maryland Route 312
- Minnesota State Highway 312 (former)
- New Mexico State Road 312
- New York:
- New York State Route 312
- New York State Route 312 (former)
- County Route 312 (Albany County, New York)
- County Route 312 (Wayne County, New York)
- Ohio State Route 312
- Pennsylvania Route 312 (former)
- Tennessee State Route 312
- Texas:
- Texas State Highway 312 (proposed)
- Texas State Highway Spur 312
- Farm to Market Road 312
- Utah State Route 312
- Virginia State Route 312
- Wisconsin Highway 312
- Wyoming Highway 312
{{Roadindex|312}} |