The SCADA system, responsible for height detection of vehicles, fire suppression mechanisms, closed circuit television and emergency lighting in the Dublin Port Tunnel failed causing traffic chaos.  The National Roads Authority (NRA) expressed “serious concerns” about both the “durability and reliablility” of the SCADA safety system.  An NRA spokesman described the shutdown as “an emergency situation”.  Adding that the system would be replaced or repaired “piece by piece” to avoid future shutdowns.

The SCADA system failure was responsible for a forced shutdown of the Dublin Port Tunnel resulting in traffic chaos.