The more purified and enlightened dimensions personified by the realms of aka along the path. They are what the Shadowlands become when they exist in a more redeemed version of themselves in the vibrational underpainting of the world.
The Brightlands are characterized by higher frequencies of light which live in sets of synchronicities according to the laws of resonance. They are the landscapes of expansive consciousness, of nobility and fellowship and the brighter qualities of light that can exist in the Creation.
The rainbow road moves between the many realms of existence, all of which manifest worlds to varying degrees of the shadowlands and the brightlands of their aka.