Route 315 is a state highway in northern Connecticut

Connecticut

Connecticut is a state in the New England region of the northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, and the state of New York to the west and the south .Connecticut is named for the Connecticut River, the major U.S. river that approximately...

 running entirely within Simsbury

Simsbury, Connecticut

Simsbury is a suburban town in Hartford County, Connecticut, United States. The population was 23,234 at the 2000 census. The town was incorporated as Connecticut's twenty-first town in May 1670.-Early history:...

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Route description

Route 315 begins at an intersection with US 202

U.S. Route 202

U.S. Route 202 is a highway stretching from Delaware to Maine, also passing through the states of Pennsylvania, New Jersey, New York, Connecticut, Massachusetts, and New Hampshire....

 and Route 10

Connecticut Route 10

Connecticut Route 10 is a state highway that runs between New Haven and the state line near Granby.-Route description:Route 10 begins at Interstate 95 as Ella T. Grasso Boulevard in the city of New Haven. It then passes by Southern Connecticut State University before entering the town of Hamden...

 in Simsbury. It heads southeast across the Farmington River

Farmington River

The Farmington River is a river located in northwest Connecticut, with major tributaries extending into southwest Massachusetts. Via its longest branch , the Farmington's length increases to , making it the Connecticut River's longest tributary by a mere over the major river directly to its...

, then turns north along the river and east to the Tarriffville section of Simsbury, where it ends at an intersection with Route 189

Connecticut Route 189

Route 189 is a state route in the U.S. states of Connecticut and Massachusetts. The route begins in the northwestern portion of the Connecticut state capital of Hartford and ends in the rural town of Granville...

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History

Route 315 was commissioned from former SR 915 in 1963. The only major changes since are the replacement of two bridges in 1992 and 1998.

Junction list

Town	Road names	Junction	Milepost
Simsbury Simsbury, Connecticut Simsbury is a suburban town in Hartford County, Connecticut, United States. The population was 23,234 at the 2000 census. The town was incorporated as Connecticut's twenty-first town in May 1670.-Early history:... (1.95 miles)	Tarriffville Rd., Elm St.		0.00
			1.95