In these nations where standard gauge railways had already been laid, the railways around stations were used as they had been, and in the sections far from the stations, new railways for high-speed operations were laid or existing railways were modified and used for high-speed operations.
なお、既に標準軌の鉄道網が整備されているこれらの国では、駅周辺は従来の路線をそのまま使用し、郊外区間では諸条件によって高速新線建設と在来線改良を使い分けることが多い。