(i) By 1880 the expanded train service was carrying about 40 million passengers a year. (ii) By the 20th century most of large metropolises such as New York, Tokyo, etc. built underground railway. (iii) Population in the city became more dispersed as now it was easy to travel. (iv) The new transport system broke down social distinctions. (v) The severe housing shortage problems of London to some extent were solved.