With around 300 crossings along the border with Northern Ireland, the need to avoid a hard border is of huge concern to those who make the daily commute.
Reporter Brendan Wright made the short journey between Cavan and Clones today to see just how frequent and complex the crossings are.
Meanwhile, Taoiseach Leo Varadkar has indicated that the aim of avoiding a hard border on the Island of Ireland could hit difficulties if the UK crashed out of the European Union and changed their customs and regulations arrangements.
If this happened it would require discussions with the UK and Ireland's European partners and already some talks on this subject have taken place, the Taoiseach confirmed.
But Mr Varadkar said if the UK leaves the EU without a deal on 29 March they would be aligned to the EU in these key areas as things stand.
The problem would only arise if the UK decided to change their Customs and regulations in some way," he said.
