A-23 is an upgrade of the N-330 and N-234. As of June 2020, it starts in the province of Huesca then runs south to Zaragoza. Then, it follows the Jiloca River south to Teruel, through the Sierra d'Espada, to the coast at Sagunto. Plans call for the freeway to reach the French border at Somport where a 8.6-km two-lane cross-border tunnel has been in operation since 2003. The freeway is also known as Autovía Valencia-Francia or Autovía Sagunto-Somport.