DKI Jakarta - Jakarta Utara
Just one player - but it takes two workers.
Page 7 of the rules says the following for the black/grey advancement space: "This is the only action in the game that may be used more than once during a round."
The "3 advancements on the industry track" space for the last turn is a different space - and thus cannot be used more than once.
And of course does it also restricted to advance the marker 3 steps? not more or less. So if you only need to take 1 or 2 steps to get your marker to the last position, can you still take the action?