A road numbering scheme is used according to rules by the fourth General Road Plan (Plan General de Carreteras) of 1939-1941 (Plan Peña).{{cn|date=July 2018}}
Six radial roads which connect Madrid with its coasts and its borders divide the Spanish continental territory (except for the Canary Islands and Balearic Islands) into 6 radial sectors. These radial roads are enumerated in clockwise fashion as follows:{{cn|date=July 2018}}
The national roads were upgraded{{when|date=July 2018}} to Autovías, and changed their name to their geographical destination instead of the city they link to Madrid, and not varying their number (A-1, A-2,...).{{cn|date=July 2018}}
The code for the national roads consists of 3 digits (e.g.: N-XXX, where X is a number) assigned as follows:{{cn|date=July 2018}}
Some exceptions apply for roads within Basque Country or Navarra, where another numbering scheme applies (e.g.: N-102).{{cn|date=July 2018}}
Signal | Itinerary |
---|
A-1 | Madrid-Aranda de Duero-Burgos-Vitoria-San Sebastián-Irún-French border |
N-110 | Soria-San Esteban de Gormaz-Segovia-Ávila-Plasencia |
N-111 | Medinaceli-Soria-Logroño-Pamplona |
N-113 | Ágreda-Valtierra (Hostal Los Abetos) |
N-120 | Logroño-Burgos-León-Ourense-Vigo |
N-121 | Pamplona-Valtierra (Hostal Los Abetos) |
N-121a | Behobia-Pamplona |
N-121b | Dancharinea-Oronoz |
N-121c | Tudela-Tarazona |
N-122 | Gallur-Tarazona-Soria-Aranda de Duero-Valladolid-Zamora-Portugal |
N-123 | Benabarre-Barbastro |
N-124 | Ollauri-Miranda de Ebro |
N-135 | Pamplona-French border |
N-138 | Estéribar (Zubiri)-French border |
N-141 | Vic-La Riba-Manresa-Girona-French border |
N-145 | La Seu d'Urgell-Andorra |
N-152 | Ripoll-Vic-French border |
A-2 | Madrid-Zaragoza-Lleida-Barcelona-Girona-French border |
N-204 | Sacedón-Almadrones |
N-211 | Alcolea del Pinar-Monreal-Alcañiz-Caspe-Fraga |
N-225 | Teruel-Grao de Castellón (overlaps with the N-340 in sections) |
N-230 | Lleida-French border |
N-232 | Cabañas de Virtus-Pancorbo-Logroño-Zaragoza-Vinaròs |
N-234 | Sagunto-Teruel-Burgos |
N-236 | AP-2-Lleida |
N-237 | Sagunto-Puerto de Sagunto |
N-238 | AP-7-Vinaròs |
N-240 | Tarragona-Lleida-Huesca-Jaca-Pamplona-Altsasu |
N-260 | Portbou-Figueres-Puigcerdà-La Seu d'Urgell-Sort-La Pobla de Segur-Castejón de Sos-Campo-Aínsa-Broto-Biescas-Sabiñánigo |
A-3 | Madrid-Valencia |
N-301 | Ocaña-La Roda-Murcia-Cartagena |
N-310 | Manzanares-Villanueva de la Jara |
N-320 | La Gineta-Cuenca-Guadalajara-Venturada |
N-322 | Bailén-Albacete-Requena |
N-323 | Bailén-Jaén-Granada-Motril |
N-325 | Novelda-Crevillente |
N-330 | Alicante-Almansa-Requena-Utiel-Teruel-Zaragoza-Huesca-Jaca-French border |
N-331 | Córdoba-Málaga |
N-332 | Vera-Cartagena-Alicante-Valencia |
N-335 | V-30 - Puerto de Valencia |
N-340 | San Fernando-Algeciras-Málaga-Motril-Almería-Murcia-Elche-Alicante-Sant Joan d'Alacant-Castelló de la Plana-Tarragona-Barcelona |
N-341 | Venta del Pobre-Carboneras |
N-343 | Alumbres-Escombreras |
N-344 | Almería-Alcantarilla-Fuente la Higuera |
N-345 | La Unión-Portmán |
N-350 | N-340-Puerto de Algeciras (Sur) |
N-351 | San Roque-Gibraltar |
N-357 | A-7-Puerto de Algeciras (Norte) |
A-4 | Madrid-Córdoba-Sevilla-Cádiz |
N-400 | Toledo-Aranjuez-Ocaña-Tarancón-Cuenca |
A-402 | Madrid-Toledo-Ciudad Real. After km 78 of the A-42 it splits into two roads: N-401 and Autovía de los Viñedos. |
N-403 | Toledo-Maqueda-Ávila-Adanero |
N-420 | Montoro-Ciudad Real-Puerto Lápice-Alcázar de San Juan-Cuenca-Ademuz-Teruel-Montalbán-Valdealgorta-Reus-Tarragona |
N-431 | Sevilla-Huelva-Portugal |
N-432 | Badajoz-Zafra-Córdoba-Granada |
N-433 | Las Nieves-Portugal |
N-435 | La Albuera-Jerez de los Caballeros-Fregenal de la Sierra-San Juan del Puerto |
N-441 | Peguerillas-Huelva |
N-442 | Huelva-San José |
N-443 | Puerto Real-Cádiz |
A-5 | Madrid-Mérida-Badajoz-Portugal |
N-501 | Ávila-Peñaranda de Bracamonte-Salamanca |
N-502 | La Serrada (Ávila)-Talavera de la Reina-Alcaudete de la Jara-Herrera del Duque-Almadén-Espiel |
N-521 | Trujillo-Cáceres-Valencia de Alcántara-Portugal |
N-525 | Benavente-Ourense-Santiago de Compostela |
N-532 | Verín-Portugal |
N-536 | Ponferrada-A Rúa |
N-540 | Lugo-Ourense |
N-541 | Ourense-O Carballiño-Pontevedra |
N-547 | Guntín-Lavacolla |
N-550 | A Coruña-Santiago de Compostela-Pontevedra-Vigo-Tui |
N-551 | Tui-Portugal |
N-552 | Vigo- Port |
N-553 | AP-9-N-550 |
N-554 | N-550-Redondela |
N-557 | A Coruña- Port |
A-6 | Madrid-Medina del Campo-Benavente-Ponferrada-Lugo-A Coruña |
N-601 | Adanero-Olmedo-Valladolid-Medina de Rioseco-León |
N-603 | Los Ángeles de San Rafael-Segovia |
N-610 | Palencia-Paradores de Castrogonzalo |
N-611 | Santander-Torrelavega-Palencia-Venta de Baños |
N-620 | Burgos-Venta de Baños-Valladolid-Tordesillas-Salamanca-Ciudad Rodrigo-Portugal |
N-621 | Unquera-León |
N-623 | Burgos-Santander |
N-625 | Mansilla de las Mulas-Cistierna-Riaño-Arriondas |
N-627 | Aguilar de Campoo-San Miguel de Ubierna |
N-629 | Colindres-San Miguel de Ubierna |
N-630 | Gijón-Oviedo-Mieres-Puerto de Pajares-León-Zamora-Salamanca-Plasencia-Cáceres-Mérida-Seville |
N-631 | Embalse de Ricobayo-Rionegro del Puente |
N-632 | Luarca-Avilés-Gijón-Ribadesella |
N-634 | Santiago de Compostela-Oviedo-Torrelavega-Bilbao-San Sebastián |
N-635 | Muriedas-Solares |
N-636 | S-10-Aeropuerto de Santander |
N-640 | O Hospital-Lalín-A Estrada-Vilagarcía de Arousa |
N-641 | Gijón-El Musel |
N-642 | Ferrol-Vegadeo |
N-643 | Folgueras-Aeropuerto de Asturias |
N-651 | Betanzos-Ferrol |