(1) Land acquisition recently started but reportedly going at brisk pace. Litigations may follow as it is reported that Farmers esp. in diva area are protesting against land acquisition. This is a weak link.
(2) Design drawing etc work is in advanced state
(3) soil testing etc work also in advanced stage in
(4) Funds shall not be a problem, as 81% shall come...
more... from Japan, allocation from Indian side shall be done given the priority being accorded to this project by Modi Govt.
(5) 21km under sea tunnel in Mumbai area may take a long time.
(6) Govt. intends to start ground construction by end of 2018, and if it succeeds, the project shall take a minimum of 6 years to complete, say by end of 2024 and there can be no maximum limit. A lot depends on which Govt assumes power at Center after 2019 General Elections.
(7) 2022 target is definitely too tough, although it is not physically impossible.