IIRC, from the late 1960s through the mid 1970s, CT 15 between East Hartford and the MA line was called the Wilbur Cross Highway.
Still is, technically, but like most other freeway names in Connecticut ("Yankee Expressway", "Connecticut Turnpike"...) it isn't in common usage.
There is a sign for "Governor John Davis Lodge Turnpike" in Greenwich on I-95 North, once over the Byram River Bridge from Port Chester, NY. As for the Yankee Expressway, there's a small sign for it at either end. One in Danbury along I-84 East (last time I checked) and one along I-84/US Route 6 West in Hartford, between the I-91 Exits and the east portal of the Hartford tunnel.
Technically, the Berlin Turnpike between Meriden and Wethersfield is the Wilbur Cross Highway as well. It passes through (heading north) Meriden, Berlin, Newington and Wethersfield. Oddly enough, until a few years ago, the Berlin section of the road wasn't
signed as "BERLIN TURNPIKE", but as "WILBUR CROSS HIGHWAY". Weird, huh? Not "BERLIN" in Berlin! (We pronounce it BER-lin here, by the way.)
As a kid driving with my mother on family trips to southern Maine, it was when I-86 was transitioning back to I-84, with much of the present ramps to/from I-384 and today's Buckland Street/Mall were all under construction (I-291 wouldn't come until 1994) in Manchester. I remember Ruby Road in the Tolland/Willington stretch being something like Exit 100 or 101!
To this day, the exit numbers on any portion of CT Route 15 make no sense. The exits at the New York border in Greenwich are out of sequence, since New York renumbered a couple of their exits on the Hutchinson River Parkway (what the Merritt Parkway becomes, once you cross into New York). First of all, Connecticut should reset the exits back to 1 at the state line. The other problem is the exit numbers between the Berlin Turnpike in Wethersfield to the I-84/US Route 6 junction in East Hartford. The last numbered exit in Meriden on Route 15 is something like 68NE. All of a sudden, there isn't another numbered exit until you reach CT Route 99 South in Wethersfield (Silas Deane Highway...one of the few roads here where the name IS used!). The last numbered exit is 90 in East Hartford, once over the Charter Oak Bridge, where US Route 5 leaves/joins Route 15.