SwitzerlandTunnel safety systemsOpen Emergency telephone system, ARHE BSA-6.06, N02 Arsenal–Hergiswil Bundesamt für Strassen ASTRA, Abteilung Strasseninfrastruktur Ost, Filiale Zofingen F3 Submission deadline November 23, 2026 at 10:59 PM UTC Contract value Not stated in the notice