List of highways numbered 503
Appearance
The following highways are numbered 503:
Canada
- Alberta Highway 503
- Manitoba Provincial Road 503
- Newfoundland and Labrador Route 503
- Ontario Highway 503 (former)
Costa Rica
India
Japan
United States
- County Road 503 (Brevard County, Florida)
- Maryland Route 503 (former)
- County Route 503 (New Jersey)
- Ohio State Route 503
- Washington State Route 503
- Territories
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