Starting in the 1960s, railways were beginning to make a comeback, and the key seemed to be much higher speeds. Japan's new high speed Shinkansen Bullet Trains proved enormously successful with passengers, carrying over 100 million passengers in just the first three years of service. The French had also begun working on a revolutionary new high train, the TGV (Train à Grande Vitesse, "high-speed train"). But the British would take a different approach. Instead of spending billions on new high-speed rail infrastructure, they would engineer a new kind of high speed train that could run on Britain's existing rail network.