Let's take another look a Juliet's speech. Gallop apace, you fiery-footed steeds,
Towards Phœbus' lodging; such a waggoner
As Phæton would whip you to the west,
And bring in cloudy night immediately.

(III, iii, 3-6)

What is Juliet really trying to do here?

express a similarity between Phæthon and Romeo, as both are driven by passions
express the lack of wisdom in wishing to alter the natural order of things by examining consequences
conjure an ancient spell that actually shortens the day
sacrifice order in favor of chaos in order to alter time (shorten the day)