This is a blade special transport system that I’ve seen used by Enercon, for instance for Europe highest wind turbine in Europe, in Switzerland, but is not so common otherwise.
It is a hydraulic lifter, which allows lifting the wind blade up to approximately 45º.
Doing so it can guarantee important saving on the civil works, above all in mountainous areas where important earthworks have to be realized to reach the wind park.
It has to be used together with a 5 axle low loader, and its price is around 100.000€.
The biggest problem is that in many countries it couldn’t be used on the public roads, due to restriction the maximum height of the load (around 5 meters).
By the way I guess that special permit are granted in some countries (for instance I’ve seen several picture where this solution was used in public roads in Germany and Switzerland).