Underground railway network in Jakarta. Why so slow to make it?

Jakarta City will make the subway network. This underground train network linking the area of ​​West Jakarta, East Jakarta, Bekasi and Tangerang. The route along the 80 km and 40 km in the city of Jakarta. The design of the underground railway network began in 2011 and will operate the fastest in 2024 and a maximum of 2027. Why so long to make the underground rail network? Method for making a tunnel underground rail network was allegedly using Tunnel Boring Machines. Tunnel Boring Machines made in Japan I think that will be used, due to funding these projects lent from JICA. Does the city of Jakarta is too late to make the underground rail network? Underground railway tunnel which was first created in the world is in London in 1863. Known as the London Under Ground. Created by the "cut and cover", ie digging a trench to be made tunnels and trenches are then closed again. The second oldest city which makes the underground rail network is Budapest, beginning in 1894, known as the Budapest Metro.

Here are some methods of making the underground railway tunnels:

1. Cut and cover, which is digging a trench to be made tunnels and trenches are then closed again. This method is disrupting vehicular traffic over the tunnel.

The Budapest Metro

2. Manual shield tunneling.

This production method was invented by the Anglo-French engineer named Marc Brunel. Making this tunnel connecting both sides of the river Thames and under the bottom of the river Thames! The tunnel is made using special equipment Marc Brunel's invention. With this tool manually tunnel lined with bricks for a while before it is coated with an iron ring. Although it got a variety of obstacles such as excavations can only go forward a bit, several times got a flood, a few times there was an explosion due to methane gas, funding difficulties, a project of this tunnel can be opened to the public in 1843. At the beginning of the tunnel design is made for pedestrians and horse-drawn carriage. Horse-drawn carriage was never used, later the tunnel was purchased for use as an underground railway. Underground railway line is joined by London Underground.