Portadown, Dungannon and Omagh Junction Railway

[6] Besides Dungannon Tunnel, the PD&O's most significant engineering features were an iron lattice viaduct over the River Blackwater and the fact that west of Pomeroy the line reached a summit of 561 feet (171 metres),[2] the highest elevation of any Irish gauge railway in Ireland.

[3] In order to reduce operating costs the GNR pioneered the development and use of railbuses,[8] and on lines including the PD&O it opened numerous wayside halts for them to serve.

[11] In 1957 the Government of Northern Ireland made the GNRB close almost all of its lines near the border including the Omagh — Enniskillen section of the L&ER,[12] but the "Derry Road" was kept open.

In 1959 the UTA closed the Dungannon — Coalisland section of the Cookstown branch[11] and reduced the PD&O between Portadown and Trew and Moy to single track.

In accordance with The Benson Report submitted to the Northern Ireland Government in 1963, the UTA closed the "Derry Road" including the PD&O on 15 February 1965.