India, Oct. 27 -- A metro line is far more than tunnels and stations. Trains run only if the track, power supply, signalling, communications and platform doors all work together without a hitch. That is why the systems side of metro projects is often harder than the civil work. Cities prefer contractors who have already made these pieces work as one system, and who can coordinate with equipment makers and other agencies.

The Nifty 50 was trading at 22,693.95, down 0.26%. Meanwhile, Sensex also fell 0.32% to 73,372.18 on Tuesday. Meanwhile, Shares of Larsen & Toubro Ltd. were trading at Rs. 3,670.30, down 0.26 percent from previous close of Rs. 3,680.00. The stock opened at Rs. 3,678.00 and reached an intraday high of Rs. 3,713.50 and lo...