A rail system for transporting wind turbine blades includes both pivoting and pivoting-sliding support structures carried by a plurality of railcars. Each support structure includes a platform system having a bolster for supporting the wind turbine blade and a support plate for supporting the bolster. The pivoting and pivoting-sliding support structures allow for selective rotational and longitudinal movement of the blades relative to the railcars as the rail system negotiates straight and curved sections of railway.