2.3.4 Provision of a buried the second 12 fibre monomode type fibre optic cable between. Thanon Chira Junction to Samran Station (Inclusive). The cable shall be buried in the same trench as provided for the signalling and telecommunications cables. Too provide additional route diversity the cable shall be buried 1 where practical, on the other track side to that used for the other route making allowance for Civil construction of the second track