India, Aug. 11 -- In Bangalore, India, Prime Minister Modi officially opened phase 2 of the urban metro system, which was expanded with German participation, with the so-called Yellow Line (19 km with 16 stations) - a milestone on the road to sustainable and modern local transport solutions in the booming, densely populated megacities of the subcontinent.Bangalore, India's third-largest city, has experienced population growth over the past ten years that has pushed the city to its limits: from ten million in 2015, the number of inhabitants has risen to over 14 million in the current year, an increase of more than 40 per cent. Road traffic is correspondingly congested: commuters spend several hours a day in the city's agonising traffic jams;...