SAINT-GOTTHARD ROAD TUNNEL: NEXANS TO INSTALL SWITZERLAND’S LONGEST HIGH-VOLTAGE UNDERGROUND LINE _PRESS RELEASE _ Nexans, in partnership with Swissgrid, will install a high-voltage line in a road tunnel, a pioneering project in Europe.Works will begin in 2028 and be completed in 2030. Paris, May 14, 2025 – Nexans, in partnership with Swissgrid, Switzerland’s national grid operator, will install a high-voltage line in the Saint-Gotthard Road tunnel. The Saint-Gotthard Road tunnel’s second tube will featu ...