Here's a success story of a non-digital project: https://transportationops.org/case-studies/i-85-bridge-colla...

The reason it was successful is because the right incentives were in place for the people doing the work. Digital or not, the fundamentals are the same.

The public sector, in particular governments, have a long history of creating bad incentives or misaligning the incentives. The root causes of this are severalfold.