 The old Swansea Tram system extended up the Swansea valley as far as Llanllienwen Road where there was a halt.With the building of the M4 motorway in 1973 the geography of Ynysforgan changed dramatically.The motorway essentially cut the village in two resulting in the demolition of the old Sunday School which stood (roughly) in the vicinity of the M4 exit slip road straight on from Clydach Road and a new Sunday school was built at the top of Garth View and Christopher Road.