The Guadarrama Tunnel is a railway tunnel across the Sierra de Guadarrama

Sierra de Guadarrama

The Sierra de Guadarrama is a mountain range forming the main eastern section of the Sistema Central, the system of mountain ranges at the centre of the Iberian Peninsula. It is located between the Sierra de Gredos in the province of Ávila, and Sierra de Ayllón in the province of Guadalajara...

, along the high speed route Madrid–Valladolid in Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

.

The tunnel has two tubes. The western tube is 28,407 m long and the eastern tube 28,418 m long, and it is the longest tunnel in Spain (when not counting the Line 12 tunnel

Line 12 (Madrid Metro)

Line 12, also known as MetroSur, is a line of the Madrid Metro. Opened on 11 April 2003, Line 12 is a circular line that is not in fact in Madrid, but links five suburban towns and one small village south of Madrid, serving around 1 million people. The towns linked by Line 12 are Alcorcón, Leganés,...

 in the Madrid Metro). The tunnel was opened for traffic in December 2007. The tunnel is used by the AVE

AVE

Alta Velocidad Española is a service of high-speed rail in Spain operated by Renfe, the Spanish national railway company, at speeds of up to . The name is literally translated from Spanish as "Spanish High Speed", but also a play on the word , meaning "bird".AVE trains run on a network of...

high speed trains.

External links

• Structurae, Guadarrama Tunnel