The operation aims, on the one hand, to improve several systems and installations to the metro network located at the L9 in which specific problems of obsolescence have been detected, and on the other hand, the photovoltaic installation to the workshops of the Free Zone of the L9 to take advantage of the solar energy resource. The planned actions involve increasing the consumption of renewable energy and energy savings, as well as the improvement in communications and remote control systems of the L9/L10 line, which guarantee global accessibility and improve the quality of service.