List of highways numbered 510 explained

The following highways are numbered 510:

Canada

• Alberta Highway 510
• New Brunswick Route 510
• Newfoundland and Labrador Route 510
• Ontario Highway 510

Costa Rica

• National Route 510

Ireland

• R510 regional road

United States

• Interstate 510
  • Interstate 510 (Arizona) (cancelled proposal)
• Florida State Road 510
• Maryland Route 510
• County Route 510 (New Jersey)
• Ohio State Route 510
• Washington State Route 510

Territories:

• Puerto Rico Highway 510