Sounds very similar to HS2 in the UK
Or probably most of those big infrastructure construction projects.
But the BBT also needs supporting infrastructure from Kufstein to Munich, the so called Brenner Nordzulauf [1], some of which (the Truderinger Spange) is also covered by the Ausbaustrecke 38 programme [2]. Unfortunately, the Brenner Nordzulauf has been hotly contested [3] with very good points being raised - among others, some of the route proposals run through nature protection reservates, people are skeptical of years worth of construction, noise, debris, rail and road blocks, and separation of entire areas by another rail track.
[1] https://de.wikipedia.org/wiki/Brenner-Nordzulauf
[2] https://www.bahnausbau-muenchen.de/projekt.html?PID=29
[3] https://www.sueddeutsche.de/muenchen/ebersberg/brenner-basis...
And the Edinburgh Tram Project
Future:
- Heathrow Third Runway (assuming the government meddle in it heavily)
- Lower Thames Crossing
However, it's now a good service, popular and the trams are probably going to be expanded to much more of the city?
https://en.wikipedia.org/wiki/Edinburgh_Trams
Also the Queensferry Crossing bridge was built with relatively little fuss - there were some delays but those were down to some spells of very bad weather.
It was a "litany of avoidable failures" as the Hardie report explained.
It does look like a tremendous success now though (not financially though. A double whammy for the taxpayer). The ends justify the means I guess?
Mind you - the investigation into the trams itself took far longer than expected and cost far more than anyone thought it should...
It's like the dessert coming out after the buffet! Doubles all round!
It does make sense since tunnels won’t need to closed for high winds like bridges do.
I might have misremembered bits of this.
An initial study into a problem poses a preferred solution.
Time and effort is put into deep study of the solution path. Unfortunately, in this case the study proves it is far less ideal than initially assumed.
The project is switched to Plan B.
Granted, sometimes this kind of early change in direction is for dumb or dishonest reasons, but one cannot perfectly know the results before the studies are completed.
I am in rail design. We are currently designing things for needs in 2030-2060. The world is complicated.
> Sund & Bælt, the Danish transport company overseeing the project, has now confirmed that IVY has not yet completed full testing and has not received final approvals from relevant authorities, despite arriving on site last October. The preparatory delay is about 18 months, a setback that project managers say makes meeting the original 2029 opening target difficult.
> There is also an issue with restrictions around the working conditions. Contracts for the main construction works were signed in 2016, before German planning approval had been granted. That timing meant certain later-imposed requirements – notably restrictions on underwater noise from work vessels and limits on sediment spill in German waters – were not written into the original contracts, complicating attempts to speed up work now that the rules are in place.