County road 523 the Høllesli tunnel – upgrading of tunnels.

fulfils the minimum requirements set by the EU in order to ensure and safe existing tunnels. The tunnel was built in 1993. The tunnel length is 822 metres and the tunnel profile is T8.5. The speed limit is 80 km/h, and ÅDT is about 1600. The works include, among other things: • Replace water and fro

st protection • Establishment of pipeline for future extinguishing water in the tunnel. • Cleaning and securing work • Blasting for havarininje and stoll for technical buildings as well as minor expansions to the tunnel profile. • New techn