The launch of a tender for its construction is still scheduled for early 2017 and the line will run parallel to the fourth bridge over the Panama Canal.
From a statement issued by the Foreign Ministry of Panama:
The presidents of Panama, Juan Carlos Varela, and Japan, Shinzo Abe, will preside this April 18th in Tokyo, over the signing of the financing and project management of the construction of Line 3 of the Metro de Panama going towards the province of Panama Oeste, a work which is expected to be started at the beginning of 2017 and to be completed in 2022.
According to President Varela, the signing of this funding is part of the strategy to modernize the transport system, which also includes the integration of a bus service with the Metro; the construction of Line 2 and 3 of the Metro; as well as the fourth bridge over the Canal.