Picture of Tunelový rozhlas

Tunelový Rozhlas Case Study

Slovakian highway construction and maintenance company, Národná dialničná spoločnosť, a.s., recently deployed a sophisticated ASL Voice Alarm (VA) system for three motorway tunnels on the D1 and D3 motorways which bypass the city of Žilina
in Northwest Slovakia, spanning over 6km of road. The brief was to provide an EN
54-compliant system for a series of motorway tunnels to allow for the safe and trouble-free evacuation of people in case of a fire event or traffic accident. The system had to cater for acoustic challenges of tunnels and to be centrally controlled and monitored.

Holmestrand Railway Station

Holmestrand train station is a new station engineered into the mountainside of the Holmestrand municipality along a tunnel 12km in length. The officially titled “Holm-Nykirke project” incorporating the construction of the double-track tunnel and the construction of the train station began in the Summer 2010. Blasting of the rock cavern, to thirty five metres wide and eighteen metres high commenced in December 2011 and concluded in 2014.