With things like subway stations it's not easy to compare the cost because more 'extravagant' design will drive the cost up. Apples and apples type comparison

With things like subway stations it's not easy to compare the cost because more 'extravagant' design will drive the cost up. Apples and apples type comparison would be comparing things like cost of building one mile of the highway. If you look at those figures they are very comparable with US having a slight edge over the EU - $6-10 mil per mile vs. €7-12 mil per km.