The A5 is a major primary route in Northern Ireland. It links the city of Derry in County Londonderry with Aughnacloy, County Tyrone via the towns of Strabane and Omagh. Just south of Aughnacloy is the border with the Republic of Ireland, where the A5 meets the N2 to Dublin. Between them the A5 and N2 are the main road link between County Donegal in the Republic and Dublin. From Wikipedia
