Canada

• Alberta Highway 1A
• British Columbia Highway 1A
• Manitoba Highway 1A
• Route 1A (Prince Edward Island)

United States

• U.S. Route 1A
  U.S. Route 1A
  U.S. Route 1A is the name of several highways found in the United States:-Wake and Franklin counties, North Carolina:U.S. Route 1A in Wake and Franklin counties, is located north of Raleigh and in two separate segments....
  
  
• Delaware Route 1A
• Massachusetts Route 1A
  Massachusetts Route 1A
  Route 1A is a south–north state highway in Massachusetts. It is an alternate route to U.S. 1 with three signed sections and two unsigned sections where the highway is concurrent with its parent...
  
  
• New Hampshire Route 1A
  New Hampshire Route 1A
  New Hampshire Route 1A is an long state highway located in southeast New Hampshire. The route runs along the Atlantic coastline from the Massachusetts border north to Rye, then turns toward downtown Portsmouth. The southern terminus is at the Massachusetts state line in Seabrook at the junction...
  
  
• New York State Route 1A
  New York State Route 1A
  New York State Route 1A was a state highway in New York City, running from the Holland Tunnel to U.S. Route 1 . It existed from 1934, when routes were first marked in New York City, until the 1960s.-History:...
  
   (former)
• Rhode Island Route 1A
• Secondary State Highway 1A (Washington) (former)

Vietnam

• National road 1A (Vietnam), a road connecting the northernmost and southernmost areas of the country