As mrichlich says, jughandles are very common in New Jersey. Then are also common in the immediate area, and New England in general, and are occasionally used elsewhere.
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These are the two
common types of jughandles. The first is a
standard jughandle, where traffic turns before the
intersection, and the second is a
reverse jughandle, where traffic turns after (and
right turns are allowed at the light). After those is an
example of a jughandle being used for
U-turns only.