The Classification of Regional Roads act 1993 states this in the R178 schedule: "between its junction with R927 at Main Street in the town of Carrickmacross and its junction with R162 at Shercock in the county of Cavan via Parnell Street and Derryolam in the town of Carrickmacross: Tiragarvan, Rakeeragh and Shanco in the county of Monaghan: and Lisdrumfad in the county of Cavan"

Notice the lack of Bridewell Lane in this schedule. Normally, roads within one-way systems are listed like this: "Dundalk Road and Farney Street (and via ONeill Street)"