Ventilation Control of the ”Södra länken” Tunnel System: Subterranean motorway gets upgraded monitoring capability

Södra länken (The southern link), is a motorway, which is connecting Essingeleden, Stockholm with Värmdöleden, Nacka and partially runs underneath the city. In total, Södra länken is approximately 6 km long, while about 4.5 km lay underground. Considering the distances, Södra länken therefore is the third largest urban, underground motorway Europe, only exceeded by the M30 orbital motorway in Madrid and the Blanka tunnel complex in Prague.