I want to focus my answer on aspects of sustainability, since we start from the premise that the viability of the infrastructure depends on the existence of financing for investments in infrastructure and that this can be maintained by income and social benefits. The electrification of a line or its construction, must collect and provide service to the mobility of people and goods, and for this it must be projected based on the existence of current or potential demand that generates income that can largely support the cost of the service , if it is public investment, or in its entirety plus a return if it is investment with private capital.