I.people [brit. angl. ˈpiːp(ə)l, am. angl. ˈpipəl]SAM.(nation)gens is masculine plural and never countable (you CANNOT say ‘trois gens’). When used with gens, some adjectives such as vieux, bon, mauvais, petit, vilain placed before gens take the feminine form: les vieilles gens.
In case of power cut at both supply points, an emergency power system that becomes operational within 15 seconds, ensures running of the trains until the next station.