Ventilation improvement test in the metro system October 21 & 22

We wish to inform you that the STM will soon begin aerodynamic testing in the metro network on the night of October 21 to 22.

The tests, which will be conducted on several mechanical ventilation stations, involve the measurement of air velocity during simulated emergency ventilation scenarios.

An information leaflet will be distributed to residents living near the ventilation stations to inform them of the possibility of noise above the usual levels.