Swansea's development plan extends beyond the city centre

From an inside source

Neath's neighbour, Swansea, has a development plan which includes the possibility of taking NPT under its wing with the proposed council reorganistion in Wales.

The Brecon to Swansea railway is likely to be revived to bring more business to the city.   Most of the track is already in position and the cost of restoring it is less than expected.

It is not yet clear if the system will link directly with a coastal railway to Mumbles that is also being considered after (or during) the development of the Swansea marina.

The Mumbles railway, which ended in the 1960s, was the oldest passenger railway in the world, and if restored, is thought to be a major tourist attraction along with forthcoming marina.

The Neath valley line will include some of the original stations bringing thousands in easy reach of Swansea and its coastline, thus avoiding road congestion and car parking problems.

The Swansea and Mumbles Railway was the world's first passenger railway service, located in Swansea, Wales, United Kingdom.

Originally built under an Act of Parliament of 1804 to move limestone from the quarries of Mumbles to Swansea and to the markets beyond, it carried the world's first fare-paying railway passengers on 25 March 1807. It later moved from horse power to steam locomotion, and finally converted to electric trams, before closing in January 1960, in favour of motor buses.

At the time of the railway's closure, it had been the world's longest serving railway.

The line in the Dulais valley was incorporated in 1862 to bring coal from the Onllwyn area north-east of Neath to the quays there, and in the following year was reconstituted as the Neath and Brecon Railway. The line was opened as far as Onllwyn in 1863 and was extended to Brecon in 1867 with an offshoot to conect with the Swansea Vale Railway giving better access to Swansea in 1873.

The passenger service was withdrawn in 1962 and present-day (2018) traffic is confined to  mineral business from Onllwyn to Neath.

...........Wikipedia