Autovía A-21
The Spanish Autovía A-21 is a highway between Jaca, in Aragon, and Pamplona, in Navarre which is partially open and partially under construction.
It follows or is an upgrade of the N-240 and links the Autovía A-15 east of Pamplona with the Autovía A-23 at Jaca providing a link through the southern Pyrenees and connections to France, Huesca and Zaragoza.
Phases
Construction began at the Pamplona end of the route, so while the sections in Navarre were completed by 2012, only six out of the eight sections in Aragon are open. One more section are under construction in Aragon but work has not yet started on one further section. Seven financial institutions funded the construction of the highway.| Road Number | Description | Status | Kilometres |
| A-21 | Noáin -Monreal | Open | 12 |
| A-21 | Monreal - Izco | Open | 8.6 |
| A-21 | Izco - Venta de Judas | Open | 7.2 |
| A-21 | Venta de Judas - Yesa | Open | 10 |
| A-21 | Yesa- Border of Navarra/Aragón | Open | 6.5 |
| A-21 | Border of Navarra/Aragón - Tiermas | Open | 4.4 |
| Tiermas - Sigüés | Under construction opening 2021 | 6.57 | |
| Sigüés - A-1601 | Open | 2.5 | |
| A-21 | A-1601 - Barranco de Colladas | Open | 2.9 |
| A-21 | Barranco de Colladas - Fago | Open | 5.4 |
| Fago - Puente la Reina de Jaca | Project halted | 11.63 | |
| Puente la Reina de Jaca - Santa Cilia | Open | 7.2 | |
| A-21 | Santa Cilia - Jaca | Open | 9.0 |