After the rockfall, several areas of potential instability were identified, leading to the installation of an high-resolution monitoring system in support of the road safe reopening. The main system is featured by 200+ instruments divided in two sets with different purpose: an early warning system and a non-early warning system. The early warning system allows the near real-time detection of displacements exceeding defined thresholds. The anomalies immediately trigger the automatic closure of the road with e-mail and SMS notifications to a pre-defined list of recipients. The non-early warning system is also based on the same thresholds, but it is aimed at the identification of medium-long term anomalies differing from the regular data trends.

Together with the conventional monitoring instrumentation, a TInSAR and Photomonitoring systems were also installed improving the anomalies interpretation at the scale of the entire slope and supporting instrumentation redundancy.

The entire system is managed by a platform where data are received and analyzed in a dedicated control room operated by NHAZCA where skilled monitoring experts work on shifts over 16/24 hours. The availability of dedicated personnel allows the immediate interpretation of anomalies triggering road closures in support of safe reopening. Instrumentation malfunctions are also quickly detected supporting a prompt maintenance operation.