| 释义 |
- Canada
- Japan
- United States
Route 121 or Highway 121 can refer to multiple roads: {{Expand list|date=August 2008}}Canada- New Brunswick Route 121
- Highway 121 (Ontario)
- Prince Edward Island Highway 121
JapanUnited States- U.S. Route 121 (former)
- U.S. Route 121
- Alabama State Route 121 (former)
- Arkansas Highway 121
- California State Route 121
- Colorado State Highway 121
- Connecticut Route 121
- Florida State Road 121
- Georgia State Route 121
- Illinois Route 121
- Indiana State Road 121
- K-121 (Kansas highway)
- Kentucky Route 121
- Louisiana Highway 121
- Maine State Route 121
- Maryland Route 121
- Massachusetts Route 121
- M-121 (Michigan highway)
- Minnesota State Highway 121
- Missouri Route 121
- Nebraska Highway 121
- Nevada State Route 121
- New Hampshire Route 121
- New Mexico State Road 121
- New York State Route 121
- Ohio State Route 121
- Pennsylvania Route 121
- Rhode Island Route 121
- South Carolina Highway 121
- Texas State Highway 121
- Texas State Highway Loop 121
- Utah State Route 121
- Vermont Route 121
- Virginia State Route 121
- Washington State Route 121
- Wisconsin Highway 121
{{Roadindex|121}} |