Under the road of Jenderal Sudirman, 16 meters underground in front of the office of Bank Panin, a hole with diameter 6 meters gaping. The lights lined attached to the distance 2 meters make a hole will not be dark. In the middle of it there's rail with bearing rubber longitudinal along the hall.

The first drill which named Antareja, was stopped in order to install concrete walls. One of Antareja's drill operates on the north side. The device can drilled the land all 8-10 meters overnight. After the land was forwarded transported to tegal alur with lori, another lori brought concrete walls. This concrete wall has 1,2 meters wide , long 4,2 meters, and thick 30 cm. For one tunnel circle, it takes six barcode concrete segments. Its barcode also as a sign of concrete placement because all the tunnel construction was computerized.

For more details, please read Koran Tempo (Printed Version) Page 21 on November 3, 2015.

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