County Route 46 (Suffolk County, New York)

County Route 46
William Floyd Parkway
Map of Suffolk County on Long Island with CR 46 highlighted in red
Route information
Maintained by SCDPW
Length:	15.37 mi (24.74 km)
Existed:	March 30, 1931 – present
Major junctions
South end:	CR 75 in Smith Point Park
	CR 80 in Shirley NY 27 in Shirley I-495 in Upton NY 25 in Ridge
North end:	NY 25A in East Shoreham
Highway system
County Routes in New York County Routes in Suffolk County ← CR 45 CR 47 →

County Route 46 (CR 46) is a major county road in eastern Suffolk County, New York, in the United States. It runs south-to-north from CR 75 in Smith Point County Park (part of the Fire Island National Seashore) to New York State Route 25A (NY 25A) near the border of Shoreham and Wading River. The road is known as the William Floyd Parkway along its entire length, and is named after William Floyd, a Long Island native and a signer of the United States Declaration of Independence. Despite its "parkway" designation within the State of New York, the road is open to commercial vehicles.

CR 46 begins at a traffic circle with (now unsigned) CR 75 in Smith Point County Park within the town of Brookhaven. A short distance north of the traffic circle, CR 46, known as the William Floyd Parkway, crosses past a large parking lot for Smith Point Beach, as well as several tennis courts and a basketball court. The route then proceeds northward to cross the Great South Bay on a bascule lift bridge and soon onto mainland Long Island. After crossing onto the mainland, CR 46 becomes a divided four-lane boulevard with a wide grass median past several bayside residential communities. Bending north through several residential neighborhoods of Smith Point, the route becomes a limited access parkway through the area, crossing into the community of Shirley near Coraci Boulevard.