There are quite some different kind of taxi's in the game which bring you from A to B.
The first one I encountered was this one.I know I know the screenshot is from Taris but I didn't want to go to Tython.
Then there is the yellow cab version. On the Empire you get black ones.
Taxi's on Balmorra and Voss look like this.
You get a train on Corellia (still want to get on the rail way but haven't found a way to climb up there.)And then there are my favorites:
Thranta's! I absolutely love them. You get to travel on them on Alderaan.
And I love the sounds they make. So cute. I WANT ONE! ;D