Cog Road is an imaginary branch of the Barry Railway dating from the late 1890s, that ran between Dinas Powys and Penarth, cutting across the moors via Cog Road and Swanbridge.

Set in the mid 1920s, the layout depicts the terminus station as it became, along with goods yard and cattle dock, which kept the line alive. Many former Barry, Taff Vale, Rhymney, Cardiff, Brecon & Merthyr, Neath and Brecon Railways locos and rolling stock absorbed into the Great Western Railway can be seen, along with newer GWR stock and Cambrian interlopers.