The Madrid–Valladolid high-speed rail line (Spanish language: Línea de Alta Velocidad Madrid – Segovia – Valladolid) opened for commercial service on 23 December 2007 and is the first instalment of a high-speed rail corridor in the north and northwest of Spain. The line is built to standard gauge and gauge changers are provided at strategic points to allow interchange with older Spanish railways which were built to Iberian gauge.
