DIAL plans to connect Delhi's IGI Airport terminals, Aerocity with 'air train'
As per DIAL, the project would be completed in 3-4 years. This timeframe fits with other timelines given by IGIA for the completion of ongoing and future phase-wise expansion projects.
This air train would be 5.1 km long train project and underground between T1 and Aerocity. It would then be elevated till T3.