<span>s=ut+<span>12</span>a<span>t2</span></span><span>
s = distance
u = initial speed
t = time
a = acceleration</span>
The personification in this is “But here and there a few cars groaning creep...” the idea this personification gives about New York is probably that New York is [obviously] just waking up and people are starting to drive their cars around the city.
Things that influences decision-making will be your mood, what you have going on and whether you want to do it
I would say that the principle means of characterization employed by the author is dialogue. Since Romeo and Juliet is a play, everything we know actually comes from the conversations, be it a dialogue, or a monologue.