Since December 2008, OHL Servicios-Ingesan is providing cleaning services to 33 subway stations in Metro de Madrid. The service is provided all year, 24 hours a day, by a team of professionals assigned to comprehensive cleaning management that covers 176,335 square meters, distributed as follows:
- 263 escalators and conveyor belts
- 93 elevators
- 76 porticoes
- 44 vestibules
Some of these subway stations in Metro de Madrid, such as Nuevos Ministerios and Plaza de Castilla, are top-level by volume of users.