People get first chance to ride subway with Mass Rapid Transit (MRT) during the full trial run in Jakarta, Indonesia, March 12, 2019. Indonesia's capital, Jakarta, held on Tuesday the first public trial run of its $3 billion mass rapid transit (MRT) system aimed at improving transport conditions in a city suffering some of the worst traffic jams in the world. ANTARA/Sigid Kurniawan

A security guard stands as he patrols at a station during Mass Rapid Transit (MRT) full trial run in Jakarta, Indonesia, March 12, 2019. The MRT, which is officially due to open on March 26, was developed with Japanese expertise and funding, and is a centre-piece of an infrastructure boom under President Joko Widodo, who is seeking re-election in April. REUTERS/Willy Kurniawan

People sit as they commute with Mass Rapid Transit (MRT) during the full trial run in Jakarta, Indonesia, March 12, 2019. Dozens of excited residents, many of them students, rode in the shiny, air-conditioned carriages, tested the ticketing machines, and wandered through the stations. "I'm impressed that it's like any foreign country, like Singapore!" said Mika, a 23-year-old student, who registered weeks ago for the trial run. REUTERS/Willy Kurniawan

Women take pictures in Mass Rapid Transit (MRT) as they commute during the full trial run in Jakarta, Indonesia, March 12, 2019. The first phase is a 16-km stretch that runs partially underground from south to central Jakarta along one of the city's main thoroughfares. The train takes about 30 minutes, compared with more than an hour by car in regular traffic. REUTERS/Willy Kurniawan

A woman arrives at a station with her children during Mass Rapid Transit (MRT) full trial run in Jakarta, Indonesia, March 12, 2019. Construction of the second line - an 8-km stretch that ends in north Jakarta - is underway and it should be operational by 2025. Ticket prices have been set at an initial 10,000 rupiah (70 cents) and the trains can carry more than 28,000 passengers a day. REUTERS/Willy Kurniawan

A Mass Rapid Transit (MRT) train arrives at a station during its full trial run in Jakarta, Indonesia, March 12, 2019. Delayed for more than 20 years, the project was finally launched in 2013, with the first line originally scheduled to open in 2018. Flood barriers have been installed to protect the underground stations from inundation. Tempo/Tony Hartawan