The evolution of systems of automatic gauge, has allowed to extend the benefits of high-speed network in Spain to a much higher number of inhabitants served by stations to the standard gauge lines, eliminating the problem of coexistence two networks with different track gauges. Thus, while high-speed lines have 2571.1 km, the trains with automatic gauge allow extending the services over 3556.7 km of the conventional network, representing, in aggregate, 49.5% of the network managed by ADIF, extending the services of variable gauge to 26,493,413 inhabitants (2010), ie 56.02% of the Spanish population. Insert your abstract text. The size of the paper must be less than 15 lines.