List of highways numbered 278
The following highways are numbered 278:
Canada
- Manitoba Provincial Road 278
Japan
- Japan National Route 278
United States
- Interstate 278
- U.S. Route 278
- Arkansas Highway 278
- Florida State Road 278
- Georgia State Route 278
- K-278
- Kentucky Route 278
- Maryland Route 278
- Minnesota State Highway 278
- Montana Secondary Highway 278
- New Mexico State Road 278
- Nevada State Route 278
- New York State Route 278
- Ohio State Route 278
- Pennsylvania Route 278
- Tennessee State Route 278
- Texas State Highway 278
- * Texas State Highway Spur 278
- * Farm to Market Road 278
- Utah State Route 278
- Virginia State Route 278
- Washington State Route 278