The following highways are numbered 1A:

Canada

Alberta Highway 1A Alberta Provincial Highway No. 1A is the designation of two alternate routes off the Alberta portion of Trans-Canada Highway 1. However, it is not the only name used for spurs off Highway 1 - Highway 1X is another such designation ...

British Columbia Highway 1A There are many roads in the southwestern part of British Columbia and Vancouver Island that were designated as Highway 1A. These roads were sections of the original 1941 route of Highway 1 before its various re-alignments, and are used today a ...

Manitoba Highway 1A * PEI Highway 1A

Route 1A (Prince Edn mm...ward Island)

Germany

Bundesstraße 1a ''Bundesstraße'' (German for "federal highway"), abbreviated ''B'', is the denotation for German and Austrian national highways. Germany Germany's ''Bundesstraßen'' network has a total length of about 40,000 km. German ''Bundesstraßen'' ...

, a German road

India

New Zealand

New Zealand State Highway 1A

United States

U.S. Route 1A U.S. Route 1A is the name of several highways found in the United States. North Carolina Wake Forest–Youngsville U.S. Route 1A (US 1A) is a alternate route of US 1 through the towns of Wake Forest and Youngsville, North Caroli ...

Delaware Route 1A * MA Route 1A

Massachusetts Route 1A * NH 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 Mas ...

New York State Route 1A New York State Route 1A (NY 1A) was a north–south state highway mostly located within New York City. It extended for just under from an intersection with NY 27 near the Holland Tunnel in Lower Manhattan to an interchange with U. ...

(former) * Rhode Island 1A

Rhode Island Route 1A Route 1A, largely signed as Scenic 1A, is a long numbered state highway located in Washington County, Rhode Island, United States. The route, which parallels U.S. Route 1 (US 1) for its entire length, has four distinct sections connected by ...

Secondary State Highway 1A (Washington) (former)

Vietnam

National Route 1 (Vietnam) National Route 1 ( vi, Quốc lộ 1 (or abbrv. QL.1) or Đường 1, links=no), also known as National Route 1A, is the trans-Vietnam highway. The route begins at km 0 at Hữu Nghị Quan Border Gate near the China-Vietnam border, runs the len ...