From the September 27, 2015, Wilmington (NC) Star-News "Looking Back" by Scott Nunn.
From September 12, 1965, paper.
There was an advertisement for oyster shell paving by the L&W Terminal Construction Company on North Herr Avenue suggesting driveway, parking lot and subdivison paving by use of this.
Oyster shell roads were quite common in the Wilmington area at one time. In 1875, a road was extended from Wilmington to Wrightsville Sound using oyster shell paving.
Oyster shells are also good because they allow water to pass through whereas solid asphalt or concrete do not. I see that in nearby Topsail Beach and Surf City, new homes have to use crushed stone for driveways to avoid flooding.