Escape from Aquidneck

Just as I came up on the traffic, I heard a radio report of a serious accident on East Main Road in Portsmouth, so I turned around and switched over to West Main. Well, this is what I encountered there:

The question is: Did WPRO mix up East and West, or is this just what happens when there are only two roads to accommodate so many people? If the latter, what an apt metaphor for life in Rhode Island.

ADDENDUM:
I just heard an update that part of East Main is actually closed down. Guess I just haven't gotten to the merging traffic yet.