sentences:  The Portadown, Dungannon and Omagh Junction Railway (PD&O) reached Omagh in 1861, completing the Portadown – Derry route that came to be informally called "The Derry Road".The Great Northern Railway (Ireland) absorbed the PD&O in 1876 and the L&ER in 1883.The Government of Northern Ireland made the GNR Board close the Omagh – Enniskillen line in 1957.