All service interchanges take a lot of space. Europe has a lot of system and service interchanges too. DD doesn't take a lot more space than a regular cloverleaf, which is commonly found all over Europe. It is however, less flexible, as the loops in cloverleaf can be shaped to fit the area.
It is capable flowing quite a large amount of traffic, so it's not suitable for building anywhere.
It is capable flowing quite a large amount of traffic, so it's not suitable for building anywhere.