The Route 15 designation was created as part of the
1932 state highway renumbering and originally ran from
New Haven through
Middletown,
East Hartford and
Stafford Springs to the
Massachusetts state line in
Union.
Wilbur Cross Parkway The Wilbur Cross Parkway is named after
Wilbur Lucius Cross, a former governor of the state (1931–1939). The
parkway was originally planned in 1937 as route from US 1 in Milford to the Massachusetts state line in Union. The portion of the parkway south of Meriden was built largely as planned. Construction began in 1939 when federal funds were secured. The first section of the parkway to open was the Milford to Orange segment, from the Housatonic River (Exit 37) to
Route 34 (Exits 42A and 42B) at the end of 1941. Subsequent construction was delayed by
World War II. After the war, two more sections of the parkway opened: the segment from US 5 in Wallingford (Exit 61) to US 5 in Meriden (Exit 65B), bypassing the city center opened in 1946; and the segment from Route 10A in Hamden (Exit 51) to US 5 in Wallingford opened in 1947. In 1948, a portion of the Wilbur Cross Parkway between
Route 34 and Whitney Avenue had still been under construction. Route 15 was temporarily routed along Route 34, Sherman Avenue (former Routes 5 and 10), Henry Street/Munson Street/Hillside Place/Edwards Street (former Route 5), and Whitney Avenue (former Route 10A). By 1949, the Wilbur Cross Parkway was completed and the temporary Route 15 designation was removed from the surface streets. Because the New Haven segment had not yet been completed, motorists were directed to temporarily follow Route 34, US 5, and Route 10A. In November 1949, the New Haven segment, from Exits 42A and 42B to Exit 52, including the
West Rock Tunnel opened. The entire parkway was a toll road when it opened in 1941. Tolls were removed from both the Merritt and Wilbur Cross Parkways in 1988. Reflecting its history as a toll road, two pairs of service plazas lie opposite one-another along the parkway where the tolls once stood, in
Orange and
North Haven. Both have been renovated since 2011, along with six further south on the Merritt Parkway. In addition to gas pumps and an Alltown convenience store at each plaza, they now include
Dunkin' Donuts and
Subway shops. Prior to the renovations, no fast-food service had been available at any of the plazas. Three abandoned rest areas remain along the parkway, in Woodbridge, New Haven, and Meriden. In 1943, a newly constructed two-lane highway (now the
Wilbur Cross Highway) between
Tolland and Union was opened to traffic. Route 15 was relocated on this new highway and the former Route 15 between
Route 74 and
Route 190 (then part of
Route 20) was redesignated as Route 30. By 1948, the rest of the old two-lane Wilbur Cross Highway to East Hartford had also opened, connecting to the
Charter Oak Bridge and the
Hartford Bypass. In 1948, the State Highway Department decided to relocate Route 15 to a series of roadways, namely the
Merritt Parkway,
Wilbur Cross Parkway,
Berlin Turnpike, Hartford Bypass, Charter Oak Bridge, and the new Wilbur Cross Highway, creating a modern, high-speed throughway from the
New York state line to the Massachusetts state line. The Route 15 designation was applied to the previously unnumbered parkways from
Greenwich to
Meriden, then overlaid with US 5 through East Hartford, then designated on the western half of the Wilbur Cross Highway to Tolland, connecting with the portion previously designated as Route 15 five years before. The former Route 15 between South Windsor and Tolland was reassigned as an extension of Route 30, and the former Route 15 between New Haven and Glastonbury became redesignated as Route 17. ==Junction list==