Mae'r rheilffyrdd yn bwysig iawn o ran cysylltu busnesau, pobl a chymunedau â'i gilydd a diwallu'u hanghenion. Er mai'r Ysgrifennydd Gwladol dros Drafnidiaeth sy'n gyfrifol am gyllido seilwaith y rheilffyrdd, mae'r seilwaith hwnnw'n dylanwadu'n drwm ar lwyddiant cynlluniau a buddsoddiadau economaidd tymor hir.
The railway provides an important means of connectivity to serve the needs of businesses, people and communities.  While the funding of rail infrastructure is currently a matter for the Secretary of State for Transport, railway infrastructure has a role in facilitating the success of long-term economic planning and investment.