Good info Mike.
One bridge which I used quite often, before Covid, was the Oresund Bridge between Sweden and Denmark – LENGTH 16.4k.
The Scandinavians seem to just get on and ‘do it’, and there is a lot of expertise very close to us , but it may be unaffordable ?
There will always be naysayers on any and every project , and sometimes they are right whilst other times they are wrong, and I am not going to comment on either viewpoint!
Just three other projects of note –
“The Ryfylke Tunnel (Norwegian: Ryfylketunnelen) is an undersea road tunnel in Rogaland county, Norway. It is part of the Norwegian National Road 13 running between North-Jæren (Stavanger/Sandnes) and Ryfylke (district) under the Horgefjord (part of the Boknafjorden). The tunnel is part of the Ryfast project. It is 14.4 kilometres (8.9 mi) long [1] and is currently the world’s longest and deepest subsea road tunnel (until Rogfast opens in the year 2029).
Rogaland Fixed Link or simply the Rogfast is a sub-sea road tunnel under construction between the municipalities of Randaberg (near the city of Stavanger) and Bokn in Rogaland county, Norway. The project will be a world record with respect to its 27-kilometre (17 mi) length and its maximum depth of 392 metres (1,286 ft) below sea level. This will be a part of the main European route E39 highway along the west coast of Norway and it will link the cities of Kristiansand – Stavanger – Haugesund – Bergen
At 24.5 kilometres, the Lærdal tunnel is currently the world’s longest road tunnel. The road links Aurland and Lærdal, in the heart of Sogn, and provides a ferry-free connection between Oslo and Bergen.”