The Berlin Turnpike is a 12.17-mile (19.59 km) major thoroughfare carrying U.S. Route 5 (US 5) and Route 15 in New Haven County and Hartford County in the U.S. state of Connecticut. The road begins one mile south of the Meriden-Berlin town line where Route 15 on the Wilbur Cross Parkway merges with US 5 along North Broad Street in Meriden and terminates at the Hartford city line. The local name of the street varies as it passes through multiple towns.

Quick Facts Route information, Length ...

Berlin Turnpike
Map of central Connecticut with Berlin Turnpike highlighted in red
Route information
Maintained by ConnDOT
Length	12.17 mi (19.59 km)
Existed	1909–present
Component highways	US 5 / Route 15 from Berlin to Wethersfield Route 314 in Wethersfield
Major junctions
South end	US 5 / Route 15 / Wilbur Cross Parkway in Meriden
Major intersections	Route 9 / Route 372 in Berlin US 5 / Route 15 in Wethersfield
North end	Maple Avenue in Hartford
Location
Country	United States
State	Connecticut
Counties	New Haven, Hartford
Highway system
Connecticut State Highway System Interstate US State SSR SR Scenic

Close

1.07 miles (1.72 km) south of the Hartford city line, US 5 and Route 15 leave the turnpike and follow the Wilbur Cross Highway northeast through Hartford towards the Charter Oak Bridge. The Berlin Turnpike continues north as a two-lane surface road as part of Route 314 for 0.69 miles (1.11 km), and then as the unsigned State Road 543 for 0.38 miles (0.61 km) before entering Hartford as the municipally-maintained Maple Avenue.

The Berlin Turnpike begins at a fork interchange between Route 15, which continues south as the controlled-access Wilbur Cross Parkway, and US 5, which continues south as a local road named Broad Street. The turnpike is the only segment of Route 15 that is not a freeway, as it is an arterial road with multiple at-grade intersections, some with traffic lights, as well as businesses on both sides of the road. The turnpike has grade-separated interchange with Route 9 and Route 372 in Berlin, as well as Route 175 on the border between Newington and Wethersfield.^[1]

In Wethersfield, US 5 and Route 15 leave the turnpike for the controlled-access Wilbur Cross Highway heading towards Hartford. This is the western terminus of Route 314, which takes a right turn onto Jordan Lane soon after to actually proceed in the eastbound direction. From Jordan Lane to the city line, the turnpike is unsigned SR 543. At the city line, the road becomes Maple Avenue and continues north towards Downtown Hartford.^[1]

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The Hartford and New Haven Turnpike was a toll road chartered in 1798 and built in 1798-99 to connect the cities of New Haven and Hartford in the U.S. state of Connecticut.^[2] The turnpike was built to connect the courthouses of New Haven and Hartford in as straight of a route as allowed by the terrain. Its southern terminus was at Grove Street,^[2] which forms the northern boundary of the original nine squares of New Haven. The road's straight line principle caused several intermediate town centers to be bypassed.

Since the turnpike's original construction, the roadway has been realigned and substantially widened to become the Berlin Turnpike that it is today — a major commercial thoroughfare. Many parts of the original alignment are maintained as local roads or unsigned state roads.