Slaine didn't give me a chance to ask what a highway was. The silly, absent-minded wizard forgets that I am not as well-traveled in the planes of existence as he is, so I don't know all the terminology of the various planes. But I assume that a highway is a road upon which many people travel, on their way somewhere else. That describes the Astral Plane perfectly.
You have left Toril, friend, and have entered the Astral Plane. That means you have access to a variety of different planes of existence. It isn't as thorough as Sigil, City of Doors, where gateways, while hard to find, are certainly not as widespread as in the Astral Plane. But do be careful as you travel through here, friend... in this vast emptiness, you might just accidently stumble on a portal of some sort... and not always to the most pleasant of places.
I have a few yarns to spin concerning people and places that are most certainly OFF my homeworld of Toril. Would you care to hear them? Then relax, let yourself float calmly through the emptiness around you, and I shall tell you..........
