A backup electrical power supply is also provided to ensure continuous operation of the tunnel.

Numerous caves, caverns and other speleological structures were found during constructions, but all of those were addressed successfully.

The speleological structures encountered during construction presented technical problems, but they have been successfully preserved as natural phenomena.

Traffic is regularly counted and reported by Hrvatske autoceste, operator of the tunnel and the A1 motorway where the tunnel is located, and published by Hrvatske ceste, the Croatian roads agency.

[6] Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the tunnel carries substantial tourist traffic to the Dalmatian Adriatic resorts.