Alstom will deliver a fleet of 20 four-car Metropolis trains, which will be assembled at the company's Sri City plant in Andhra Pradesh.

The line will be equipped with Alstom's Urbalis CBTC, which will enable minimum headways of 100 seconds.

The 22.9km north-south line from Munshi Pulia to Chaudhary Charan Singh International Airport will have 22 stations, 19 of which will be elevated with three underground stations on the central section. The line will have a maximum design speed of 80km/h and a commercial speed of 34km/h.

The initial 8.4km phase of the line is due to open in 2017 and daily ridership is forecast to reach 645,000 by 2020.