Swansea Vale Railway nineteenth century, when land transport was limited to what pack animals could carry on their backs. At that time the extraction of copper in Cornwall became an important industry, and as a great deal of coal is required to smelt copper, it became the practice to bring the copper to Swansea by ship and smelt it there. This specific sector of the metal industry became so dominant that Swansea was given the nickname "Copperopolis". The works engaged in this industry were located on the banks of the River Tawe at first, but the construction of the Swansea Canal, opened in
Swansea with the A48 before continuing through mid Wales and terminating at Chester. The A4067 connecting Mumbles with the city centre and continuing up the Swansea Valley towards Brecon is also a dual carriageway for much of its route through Swansea. Other notable local roads include the A484, which provides a link from Fforestfach west to Llanelli, and the A4118, the main route westwards from the city centre across Gower to Port Eynon. Swansea railway station is located 10 minutes from Swansea bus station by foot. Services calling at Swansea operate to Llanelli, Carmarthen, Milford Haven and Haverfordwest to the west,