As a Ligurian, it was not so exceptional, surely, back then and still today passing though so many mountains and valleys keeping the road as straight and levele

As a Ligurian, it was not so exceptional, surely, back then and still today passing though so many mountains and valleys keeping the road as straight and leveled as possible was remarkable in engineering terms BUT they have created a monster because back then it was a new road, so normal traffic goes through other roads, and start to took the new shiny fast one once done. Unfortunately NO ONE have planned how to re-create it because back than the idea was that the concrete it's like a natural rock, nearly eternal, so there was no plan on how to rebuild any bridge or tube when it will be needed. Meanwhile old roads essentially a re-paved ancient Roman Via Aurelia, was not much developed, still traversing ANY single Ligurian dwelling, so it's definitively unable to sustain today traffic even for short segment to re-made a single bridge or tube at a time. Here and there some new segments are built and once done traffic got diverted on the new segment, but the overall aging infrastructure is in a terrible shape and while some new segments advance there is still no complete plan because in many segments there is simply no solution so far to build something new due to excess buildings around, not adapt orography and so on. That's not an isolated case, essentially all other the world all infra are made without any idea about what to do after their expectable service life BUT the Italian issue is also due to the fast construction: if you build something SLOWLY some parts of a big infra will need to be rebuild at a certain point in future, while the others are still operational, so you can upgrade them at an equally slow speed. If you develop all at once as quick as possible well, it will reach the end of life all at once as well. So an original remarkable effort demand another one, than another one more etc and no one can foresee the economical, political, condition when the infra end of life will be reached. In general MOST post-WWI infra and buildings are now at end of life, all together, since they was built quickly all together and as any quick thing was badly built, with mass speculation, no intention to even trying imaging the future and so on. We now know in many fields that creating megaprojects might be exiting but way to often the outcome is TERRIBLE, so it's better build much little things instead of few big. A lesson learnt by many, but still to be learned by many others.