The construction of the fourth tunnel has commenced for the underground route in Meerut.
https://swarajyamag.com/infrastructure/delhi-ghaziabad-meerut-rrts-corridor-construction-work-of-fourth-tunnel-commences-in-meerut
https://swarajyamag.com/infrastructure/delhi-ghaziabad-meerut-rrts-corridor-construction-work-of-fourth-tunnel-commences-in-meerut
Delhi-Ghaziabad-Meerut RRTS Corridor: Construction Work Of Fourth Tunnel Commences In Meerut
swarajyamag.com