List Of Highways Numbered 503 on:
[Wikipedia]
[Google]
[Amazon]
The following highways are numbered 503:
Alberta Highway 503
*
Manitoba Provincial Road 503
*
Newfoundland and Labrador Route 503
*
National Route 503
Japan National Route 503
County Road 503 (Brevard County, Florida)
* 
Maryland Route 503 (former)
* 
County Route 503 (New Jersey)
* 
Ohio State Route 503
* 
Washington State Route 503
;Territories:
* 
Canada
* Alberta Highway 503
* Manitoba Provincial Road 503
* Newfoundland and Labrador Route 503
*Ontario Highway 503
Secondary Highway 503, commonly referred to as Highway 503, was a provincially maintained secondary highway in the Canadian province of Ontario. The route existed between 1956 and 1998. Between 1956 and 1963, the highway stretched from Kirkfiel ...
(former)
Costa Rica
* National Route 503
India
* National Highway 503 (India)
National Highway 503, commonly referred to as NH 503, is a highway connecting the city of Dharamshala to Mubarakpur in Himachal Pradesh. NH503 has been extended from Mubarakpur to Kiratpur in Punjab. The route of NH503 is extended from Mataur Ka ...
Japan
* Japan National Route 503
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:
* Puerto Rico Highway 503
Puerto Rico Highway 503 (PR-503), also called Carretera Tibes (Road to Tibes), is a tertiary state
{{Road index, 503