Connecticut Route 40

Route 40
Map of New Haven County in southern Connecticut with Route 40 highlighted in red
Route information
Maintained by ConnDOT
Length:	3.08 mi (4.96 km)
Existed:	1976 – present
Major junctions
South end:	I-91 in North Haven
North end:	Route 10 in Hamden
Location
Counties:	New Haven
Highway system
Routes in Connecticut Interstate U.S. State SSR SR ← Route 39 Route 41 →

Route 40, also known as the Mount Carmel Connector, is a 3.08-mile (4.96 km) spur route from Interstate 91 (at Exit 10) in North Haven, Connecticut connecting I-91 and Bailey Road in North Haven to Route 10 in the Mount Carmel neighborhood of Hamden. Route 40 is a 4-lane freeway with one intermediate exit leading to / from U.S. Route 5 in North Haven. It crosses over Route 15 (Wilbur Cross Parkway) but does not have an interchange with it. This is the only place in the state where two freeways cross without an interchange.

Route 40 begins from northbound I-91 in North Haven as the Exit 10 off-ramp. The designation runs for 0.5 miles (0.80 km) along the exit ramp. The expressway then proceeds northwest and is joined by on-ramps from Bailey Road and southbound I-91. The I-91 interchange includes an overpass over the Quinnipiac River and railroad tracks. About 0.3 miles (0.48 km) past the I-91 interchange, the road crosses over another set of railroad tracks, then has an interchange with U.S. Route 5. Access to and from US 5 is via Dixwell Avenue (SR 717) or Devine Street (SR 720). The road then continues through a rock cut where it crosses over the Wilbur Cross Parkway without an interchange about 0.6 miles (0.97 km) from the US 5 junction. The road soon enters the town of Hamden, where it crosses over the Mill River and closely parallels Route 22 for the rest of its alignment. Route 40 ends at the traffic lights with northbound Whitney Avenue (Route 10). At that intersection it also, down the road, junctions up with CT Route 22, no trucks on both east and west routes.