Em is referring to the same Van Dyke Avenue in “Yellow Brick Road” from his Encore album.
This is also a play on words, knowing how much Eminem loves disrespecting women and talking about lesbians, which is shadowing his urge to want to call the girl he’s with a dyke (lesbian).
Van Dyke Avenue is a street/road in Detroit crossing 8 Mile Road.
It’s quite long, too:
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