What is it with highways numbered 74?

[xonhulu]

I've always thought it would make more sense to put I-74 on an upgraded AA Highway in KY, anyway.  More direct route to Ashland/Huntington.

[shoptb1]

I've always thought it would make more sense to put I-74 on an upgraded AA Highway in KY, anyway.  More direct route to Ashland/Huntington.

That definitely would avoid ODOT's reluctance to embrace the project; maybe have I-74 overtake the existing I-471 to the intersection with I-275, where it would basically follow US-27 (Alexandria Pike) down to the AA highway?

[Hot Rod Hootenanny]

It later became Oh 32 and was 4 laned as part of the Apalachain Highway, which has now been considered for I-74's eastern extension.

Really?  I thought the whole thing had pretty much been written off by ODOT.

It's dead.  But once on the books, any project can be "raised from the dead." 
Ex: The Oh 161 New Albany Bypass.  Shown in the 1973 MORPC Columbus transportation plan, never thought of till Les Wexner & friends came up with the Easton Development in NE Columbus back in the late 90s.

[SSOWorld]

WIS 74 abruptly ends at the Milwaukee County Line and becomes a county trunk highway - no other state highway or county highway intersects at that point.

[florida]

I remember circa 1977 that PGA Blvd in North Palm Beach was marked "S-74" at the time (it's now SR 786).

Also, there were two other sections of S-74s, west of there, which are county routes today.

[Dougtone]

New Jersey Route 74 was never built but is still in state legislature.

Forty years ago, NY 74 from the Adirondack Northway east to Ticonderoga was actually signed as NY 73 and aptly passes through the town and lake named Paradox.

Well, current NY 74's been that. Also, NY 74's short portion to the ferry was once NY 347.

And of course, NY 74's extension into Vermont, VT 74 also ends at a ferry crossing.  That's probably the most notable thing that VT 74 does.

Then there's PA 74, which is a fairly normal state highway, which starts in the mountains, then goes through Carlisle and York on its way to the Maryland state line.

[hbelkins]

KY 74 is a relatively innocuous state route. It begins at US 25E in Middlesboro at the foot of Cumberland Gap, and runs west, crosses a mountain, and becomes TN 90 at the state line.