Velsertunnel publieksdag 2017
After about nine months of intensive redoing about everything in this tunnel, including enlarging the height, it was opened to the public for two days. Well, one day, as the Saturday part of the event was cancelled because of black ice and snow.
It's squeaky clean, nicely fitted with lights and electronics and seems to be in a decent shape for the next few decades. Great few hours out for the family.