A list of roads designated A1, sorted by alphabetical order of country.
- A01 highway (Afghanistan), a long ring road or beltway connecting Kabul, Kandahar, Herat and Mazar
- A1 motorway (Albania), connecting Durrës and Kukës
- A001 highway (Argentina), a beltway surrounding the city of Buenos Aires
- A1 road (Australia) may refer to several roads part of the highway 1 including the following segments:
- A1 motorway (Austria), connecting Vienna and Salzburg.
- A1 motorway (Belgium), connecting Brussels, Antwerp and Breda
- A1 highway (Bosnia and Herzegovina), carrying Corridor Vc
- A1 highway (Botswana), connecting Gaborone and Francistown
- A1 motorway (Bulgaria), connecting Sofia and Burgas via Plovdiv
- A1 road (Canada) may refer to a class of provincial roads in Manitoba, Canada: see for instance Manitoba Provincial Road 280
- A1 motorway (Croatia), connecting Zagreb and Split and continuing to Dubrovnik
- A1 motorway (Cuba), connecting Havana to Sancti Spíritus, largely under construction
- A1 motorway (Cyprus), connecting Nicosia and Limassol
- A1 road (France) may refer to:
- A1 motorway (Germany), connecting Oldenburg, Holstein and Saarbrücken
- A1 motorway (Greece), the principal north–south motorway, connecting Athens with Thessaloniki and the Macedonian border
- A1 road (Isle of Man), connecting Douglas and Peel
- A1 motorway (Italy), connecting Milan and Naples
- A1 road (Jamaica), connecting Kingston and Lucea
- A1 road (Jersey), connecting St. Helier and St. Aubin
- A1 highway (Kazakhstan), connecting Nur-Sultan and Petropavl
- A1 road (Kenya), connecting Tanzania and the Sudanese border
- A1 road (Latvia), connecting Riga and Ainaži
- A1 highway (Lithuania), connecting Vilnius and Klaipėda
- A1 motorway (Luxembourg), connecting Luxembourg City and the German A64
- A1 road (Malaysia) may refer to:
- A-1 motorway (Montenegro), currently connecting Smokovac and Mateševo, it will connect Bar and Boljare at the Serbian border when completed
- A1 motorway (Morocco), connecting Rabat and Tanger
- A1 road (Namibia), connecting Windhoek and Okahandja, and consisting of sections formerly designated B1 upgraded to freeway
- A1 motorway (Netherlands), connecting Amsterdam and Oldenzaal at the German border
- A1 highway (Nigeria), connecting Lagos to Niger in the north
- A1 motorway (North Macedonia), connecting Serbian and Greek borders
- A1 road (People's Republic of China) may refer to:
- A1 highway (Poland), connecting north to south Poland
- A1 motorway (Portugal), connecting Lisbon and Porto
- A1 motorway (Romania), connecting Bucharest to Nădlac, at the Nădlac II–Csanádpalota border (Romania–Hungary)
- A1 motorway (Serbia), connecting Horgoš at the Hungarian border and Preševo at the Macedonian border via Belgrade
- A1 motorway (Slovenia), connecting Šentilj at the Austrian border and Koper via Maribor and Ljubljana
- A1 road (Spain) may refer to:
- A1 highway (Sri Lanka), connecting Colombo and Kandy
- A1 motorway (Switzerland), connecting St Margrethen and Geneva
- A1 motorway (Tunisia), connecting Tunis and Sfax
- A1 road (United Kingdom) may refer to:
- A1 road (United States of America) may refer to:
- A1 road (Zimbabwe), connecting Harare and Chirundu