The rail line that connected Singapore and Bangkok in the 1930s, ran due west out of Bangkok to Nong Pladuk. Here it took a hard left turn through Ban Pong and then straight south. The TBR actually begins in Nong Pladuk where the new track was laid as a hard right curve heading northwest towards Kanchanaburi.
Today, Nong Pladuk remains an active maintenance and repair facility. One of the main issues for the mainly British POWs who was assigned to the Nong Pladuk work camp was its proximity to that large rail yards which was a target for Allied bombers. Dozens of them were killed or injured in those bombing raids.
There are a number of stacks of discarded rails and wooden sleepers near the Nong Pladuk station. Whether or not there date to the POW era is unknown. They are indeed the older type of rail that was bolted together in 10m sections, but their actual age and origin is not clear.
Some of these rails have nearly obscured markings that do not seem to match any of those found in other portions of the railway.