Having just graduated from William & Mary in 2001, I recall many drives I took around the greater Williamsburg area. During my time down there, SR 321 (Monticello Avenue) was being extended out past SR 199. At the time of my graduation, it came to an abrupt end just past News Road (secondary 613), depositing drivers onto a small neighborhood street called Powhatan Secondary. There was another, shorter section of Monticello Avenue (which presumably would also take the 321 numbering) constructed from Centerville Rd/secondary 614 a little ways toward the east. Latest maps indicate that this section will eventually join up with the main route, and that it will all be extended past 614, finally ending at SR 5. Indeed, as of late 2001, construction had begun on the intersection with 5.

The entire stretch of Monticello Avenue (part of which is signed VA 321) appears to now be complete between VA 199 and VA 5. However, about a half mile south/west of the junction with 199, signs have appeared marking the (new) roadway as secondary highway 5000.

From Dave Mantuori:
I was still living in Williamsburg when VDOT and the county built the road 
that separates Eastern State from the "James Blair Terrace / Dillard 
Complex" area of William & Mary. They installed a traffic light at the 
intersection (which they had just made into a 4-way cross street). 
Diagram:


    N               SR 615 |    |

    ^             Longhill |    |                     W&M Dillard

    |            Connector |    |                     Complex

W <-+-> E             Road |    |                     (dorms)

    |                      |    |

    v                      |    |

    S                      |    |   Plumeri Park

                           |    |   (W&M baseball

                           |    |   stadium)

                           |    |

                           |    |

VA 322                     |    |   Ironbound Road

(Eastern State Hosp Rd?)   |    |   (unnumbered city street)

---------------------------+    +---------------------------



---------------------------+    +-----    ------------------
                           |    |    /   /
                           |    |   /   /
                           |    |  /   /
                           |    | /   /
                           |    |/   /
                           |    /   /
                           |       /
                           |      /
                    SR 615 |     /
                 Ironbound |    /
                      Road |    |

Note that Ironbound Road is the street on the EAST and SOUTH sides of the 
intersection, as Ironbound has always made a sharp turn here. This is also 
on the Williamsburg city line, with the city on the east side of the 
north-south road. SR 615 used to officially end here, but now it continues 
north on Longhill Connector Rd to its new terminus at SR 612, Longhill 
Road.

The signage at the diagrammed intersection is interesting.

Coming west on Ironbound past the W&M dormitories and the baseball 
stadium, the sign assembly reads:

   South                                     North
   SR 615              VA 322                SR 615
(left arrow)   (straight-ahead arrow)    (right arrow)

Coming north on Ironbound, before the little ramp, it looks like:

                       North                  TO
   VA 322              SR 615                US 60
(left arrow)   (straight-ahead arrow)    (arrow for ramp)

and there is another sign assembly at the light heading north, identical 
to the previous one ecept that the "TO US 60" signs are not there at all.

Coming south on Longhill Connector one unsurprisingly sees:

    TO                 South
   US 60               SR 615                VA 322
(left arrow)   (straight-ahead arrow)    (right arrow)

Note that in none of these signs is a direction for VA 322 ever given.

Prior to the new road and the intersection's reconstruction, the sign 
assemblies used the small 1950s-ish cutouts. On Ironbound heading north it 
had "VA 322" and a left arrow, and "TO US 60" with a right-up diagonal 
arrow. On Ironbound heading west there was a "SR 615" and a left-up 
diagonal arrow, and "VA 322" with a straight-ahead arrow.

I do not know what the signs look like coming OUT of Eastern State.

The other end of VA 322 is at SR 612, Longhill Road. Oddly enough, SR 615 
crosses VA 322 in the middle for some reason. It's been quite some time 
since I've been that far out Longhill so I don't know what the signs look 
like, only that there are VA 322 signs on that end. (But prior to the 
construction of the Longhill Connector there might NOT have been.)