I do often use public transportation when arriving to a different city (if they have of course). Cause that is the best way to know the real local life and people.
Jakarta is a very big city, most populated one in South East Asia. They have commuters and Bus Rapid Trans or so-called BRT. Beside extremely good coffee, transportation is another thing that you should experience yourself here, notably in the real rush hours
A train in the rush hours, Jakarta 4th May, 2017