Longitudinal – and Transverse Ventilation in Road Tunnels

Vehicles, which are driving through a road tunnel, emits exhaust fumes. These exhaust fumes are dangerous for the people and therefore they must be diluted with fresh air. Three different ventilation systems are used in a road tunnel to dilute these fumes – longitudinal ventilation with jet fans – semi-transverse ventilation – transverse ventilation Each ventilation system has its advantages and disadvantages