The Mumbai Metropolitan Region Development Authority (MMRDA) in India is inviting tenders for two new metro rail projects, covering DN Nagar to Mankhurd Metro-2B and Wadala to Kasarvadavali Metro-4.

Tenders are invited for the design and construction of elevated viaducts and stations.

Tenders will be accepted from eligible contractors for five packages on the 23.5km-long DN Nagar to Mankhurd Metro-2B corridor, which will involve an investment of Rs109.86bn ($161.1m).

The packages are ESIC Nagar to Khira Nagar, Saraswat Nagar to ILFS in BKC, MTNL Metro to Chembur, Diamond Garden to Mandale (Depot).

Design and construction of elevated viaducts will take place for railway crossings near Kurla on Central Railway and Lokmanya Tilak Terminus.

"Once the contracts have been finalised, work is slated to start during May or June."

The tenders also included design and building an elevated viaduct and stations on the Rs145.49bn ($2.13bn), 32km-long Wadala to Kasarvadavali corridor.

These packages are Wadala to Amar Mahal Junction, Garodia Nagar to Surya Nagar, Gandhi Nagar to Sonapur, Mulund Fire Station to Majiwada, and Kapurbawdi to Kasarvadavali.

Once the contracts have been finalised, work is slated to start during May or June. Work on the two new metro lines is expected to conclude by 2021.

Maharashtra chief minister Devendra Fadnavis said in a statement quoted by Hindustan Times that the two metro lines are expected to serve eight million people a day once they are ready.