You really should not ask Hamburg for some pointers on building such projects. ( The new concert hall, the Elbphilharmonie, was estimated to cost about 250 M eu

You really should not ask Hamburg for some pointers on building such projects. ( The new concert hall, the Elbphilharmonie, was estimated to cost about 250 M euros entirely financed by donations. The current estimate is, that the city will have to pay something like 500 M Euros.) And on the topic of the Deckel, they only have to build the roof since the highway already runs in a trench.