The activity involved the drafting of technically advanced ventilation procedures (algorithms) for the management of ventilation systems installed in the tunnels of the A5 motorway, in the section between Aosta and the Mont Blanc tunnel. The 10 tunnels in question feature a twin-tube configuration, unidirectional traffic, lengths exceeding 1,000 meters, for a total route length of 24.5 km, and are equipped with mechanical ventilation in accordance with Legislative Decree 264/06.

The algorithms are designed to operate under normal operation, emergency, and maintenance conditions, integrating with the management systems of other safety installations. Specifically, during normal tunnel operation, the procedures aim to control pollutant concentrations (CO, OP, and potentially NO2-NOX) through a control algorithm that monitors the real-time average pollutant concentration, predicts and determines the optimal ventilation regime, and manages the activation of the fans.

In emergency conditions, the primary goal of the algorithms is to ensure proper airflow direction and dilution of combustion products to safeguard users and support rescue operations. In this scenario, the control algorithm monitors the fire's evolution and ventilation speeds, defines the appropriate ventilation regime, manages the operation of the fans, compares results with ventilation requirements, implements any necessary corrections, and activates compensatory safety measures on other systems.

The procedures also include alarm management, monitoring of operational parameters, and the reporting and logging of events and system states. The planned activities therefore covered both the analysis of existing systems and control logic, and the design of new installations or the updating/implementation of related IT control systems.