 The village is served by Stagecoach bus route 120 between Blaenrhondda and Pontypridd/Caerphilly; and Veolia Transport Route 175 between Clydach Vale/Tonypandy and Porth.Trealaw has never had very much by way of commerce and industry.At the lower end, there was Davies's soft drinks factory in Marjorie Street, while in Trealaw Road the Co-op and the Hopkin Morgan bakeries provided the main employment.