The spell says:
When casting the spell, draw a circle 10 feet in diameter on the inscribed floor with signs that link your location to a permanent teleportation circle of your choice, whose sequence of signs you know and is on the same plane of existence as you.
The co-creator of D & D 5e, Jeremy Crawford, was clarified unofficially on Twitter that the fate of teleport (which may be a stealth of cirlce teleportation) can move:
The teleportation spell requires a destination. The nature of that place is not specified. It can be the deck of a moving ship, for example.
In the same way, the surface of the circle is important, not its point in space. Therefore, the surface can also be moved while performing the teleportation circle spells every day for a year, and after that it has become permanent. It has no restrictions so that the permanent sigil does not move.:
When you launch a teleportation circle, you create the circle on the ground. The circle is linked to that surface, not to a point in space.
What happens if I cast the spell on the vehicle for a year (and it does not move) and then the vehicle moves? Can it still be used as a destination point?
Yes, the goal is stealth, not the point in the space where the spell was cast.
Can I create a permanent CT on the vehicle if it is never in the same place twice in the first place?
Yes. Jeremy's publication shows that.
But, even more from a real world perspective, all movement is relative. On Earth, we tend to think of places we travel as stationary, but they are not. They are rotating around the axis of the Earth and rotating around the sun. To the car / plane in which we travel, they are standing (in relation to themselves) and the Earth is moving beneath them …
All right, I'm getting too involved in Einstein in a D & D question. I read "the same location" more like "the same place" than the same longitude and latitude.