The basic idea is to construct a tunnel as an affordable linkage infrastructure and create maximum benefit in the broadest sense to the communities involved and stakeholders. This linkage has to be able to generate funds to support it itself. As a result a mass transportation mode generating as much interest as possible must be part of the project. Proposals in the past that only dealt with transportation aspects have been hard to float. This idea stressing regional development and generating lots of popular support will be more likely to be successful.
Controlling Cash Flow
In order to well control the cash flow the investment cost should be reasonable enough and if possible be disbursed in phases. While some reports cite that the investment cost for the suspension bridge ranges from US$ 7.4-24 billion they point out that the cost of the tunnel is merely US$ 3-4 billion. In addition to this, the investment cost for the tunnel can be disbursed twice should the tunnel be constructed in two phases, with each part costing US$ 1.5-2 billion.
Capital and Interest Integration
The linkage system should be able to incorporate all relevant interests. The regional development carried out along with the introduction of the system would trigger economic generation, not only in the western part of Java and in the southern part of Sumatera, but also, in the influenced regions as a whole and the nation in general. This economic activity will tie both local and central government interests as they are both beneficiaries of the new economic growth. Enhanced public welfare will create regional stability and is the premium to national security. For this premium the national government will need to provide area concessions for a certain period of years.
The linkage system should be multipurpose and incorporate all pertinent interest groups. The system will need to incorporate as many lifelines as possible such as oil, gas, coal slurry, extra high transmission, telecommunication and train lines. As these items are controlled by several agencies the link will incorporate interests shared by the respective bodies involved.
The public facilities that will be constructed at the end points of the system such as terminals, malls, recreational, rest, resort areas, public housing, schools and universities, depots, golf and entertainment parks will bring together interest and capital. This will raise the significance of the linkage system.
There are risks faced by the system that should be born by the stakeholders. The stakeholders meant here, are among others, the central and local governments, the governmental agencies, the private investors and the operators. As long term investment and operations are involved, all risk has to be minimized reasonably. Several things can be pointed out, such as the structure of the linkage infrastructure must itself be technically safe, sound, sabotage resistant, durable, reliable and as maintenance free as possible. Central as well as local governments must securely protect the investment and security must be of the highest kind legally available. All related operations must be covered by regulations that are respected by all stakeholders including the governments.