Glasgow's M8 (incomplete) ringroad is famous for its ski-jumps to no-where and ghost junctions and sliproads.

https://www.roads.org.uk/articles/glasgow

https://www.scottishroadsarchive.org/m8

There's a really good book on the subject matter by John Cullen who was one of the original engineers who worked on the project:

https://www.amazon.co.uk/dp/0955378109