This project is basically a technical building of the high-speed railway line between Madrid and Valladolid that also serves as a passenger’s stop for certain trains. Hence, most of its surface is intended for technical and private use and only the ground floor and access to the platforms has a public use. The railways are next to the main building and at the same ground level, so the access to the opposite platform is made by an underpass which begins with a spiral ramp in the main building lobby. The technical area is distributed in offices and technical rooms with natural light and ventilation. The circular shape responds to the optimization of the built surface, due to its highly technical purpose and small passenger’s traffic.