MANILA - The capital's first ever subway system will be partially opened before President Rodrigo Duterte steps down in 2022, one of his economic managers said Wednesday.

The $5 billion subway, which will connect Quezon City in the north to the Taguig financial district in the south, is scheduled for completion in 2024.

• Infrastructure is key to 'Dutertenomics'

Budget Secretary Benjamin Diokno said the government would "make sure" 10 to 12 stations would open within Duterte's term.

Construction will begin by 2019 or early 2020, he said.

The subway is one of major projects under "Dutertenomics," the President's ambitious plan to build P8 trillion in new railways, roads and airports to help spur economic growth.