“…Investment costs can be regarded as a main influencing factor for underground infrastructure planning (Gordijn, 1999). Other researchers (see Butler, 1978;James, 1980;Howgego and Roe, 1998) make reference to the relative costs involved in this venture. In developing a capsule pipeline network, there will be significant sunk costs in delivering the infrastructure and so it is essential the network offers a long term transport solution.…”