A survey and review of relevant information, such as coupled railway construction project quality Lopburi – Pak Nam Pho, the railway construction project via a pair Nakorn Pathom range – and the railway construction project, map light shift ranges coupled – Junction Road, JI projects, including the railway via the pair that has been used by such stations, Sala thammasop – Nakhon Pathom station, chiangraknoi station – phachi junction – lop buri and phachi junction station map light shifts, etc.Including consideration of education path 4 path. It found that the use of the telecommunications system in the current mandate and signals and future projects of the country Thailand national railway systems, signal and telecommunications systems mandate different according to each path. By type of system can be divided into the mandate. As follows: Table 1 shows the type of systems 2.10.1-signal path-based mandate, 4 pairs of paths and Figure 2.10.1-1 horizontal path of a project to train with the electrical system in the four directions.
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