Hold tight, a global metro railway boom has only just begun
Over the years, networks sprouted in Paris, New York, Tokyo, Moscow, Hong Kong, Cairo and elsewhere. By 2013, they encompassed over 130 cities, stretching 10,922km—long enough to get you from the equator to the North Pole. Also Read: Andy Mukherjee: India’s EV race with China may depend on high-speed trains What’s most remarkable is what…