Question for y'all: I just drove the Dayton International Airport Access Road and apparently it's not a state highway. So who maintains it? When was the freeway portion built through US 40 to I-70? Historicaerials suggests that first the new terminal was built (1961), then the new access road was constructed to US 40 (1968 shows it being improved near the terminal), but there's a gap to the "1984" aerial where the whole access to I-70 is shown. Meanwhile, the airport's own website suggests the access to I-70 came somewhat later than 1984, hence my quotation marks.