[shaunxcode]

I think we can both agree that frontscalator makes more sense.

[jodrellblank]

I think transcalator fits together more nicely.

(Edit: or maybe flatscalator)

[isleyaardvark]

I think parallelscalator has a nice ring to it.

[ramchip]

Some are concurrent, but hardly all of them!

[jodrellblank]

Since you must go on one then the next: serialscalators?

[billybob]

Unless you like to ride it facing the wrong way. Then it's a backscalator.

Or is that the one going the other way?