Single black road signs marking each crossing are currently the only physical infrastructure on the Irish Border. But it wasn't always that way.

This data was compiled with reference to Border Roads to Memories & Reconciliation, a project supported by the European Union’s PEACE IV Programme, START's Global Terrorism Database, University of Maryland and The Irish Times Newspaper Archive. It is important to note that these incidents are just a sample of border incidents that took place during the Troubles, largely gathered through local newspaper reporting.