385 looks an eensy bit more probably than 384, but I could see it also being that, because Murphy's Law. I Googled around for an exit number with no success.
While on the topic of exit numbers,
LizLickRd thru
OldFraRd all have exit numbers shown in OSM. I only bothered to check
LizLickRd in GMSV, but Exit 432 is shown in the field.
I don't know if these numbers would be slated to change per the I-87 designation; that could maybe complicate things. (
I-87FutRoc itself has 3 waypoints labeled without exit numbers.)
Since US64 is itself an exit-numbered highway, the 4(87) thru 14(87) labels just west of there are correct. Moving westward...
I-40(###) -> ###(40)
US1(###) -> ###(1)
US1(98) -> 404
Add interchange for
KelRd just west of NC540.
NC16 -> 254
US264 also has some labels that can similarly change.