New York State Route 381

New York State Route 915E
Third Avenue Extension
Map of Rensselaer County in eastern New York with NY 915E highlighted in red
Route information
Maintained by NYSDOT
Length:	1.67 mi (2.69 km)
Existed:	late 1990s – present
Major junctions
West end:	NY 151 in East Greenbush
East end:	US 4 in East Greenbush
Location
Counties:	Rensselaer
Highway system
New York Highways Interstate U.S. State Reference Parkways ← NY 380 NY 382 →

Coordinates: 42°38′39″N 73°42′24.5″W / 42.64417°N 73.706806°W / 42.64417; -73.706806

New York State Route 915E (NY 915E) is an unsigned reference route designation for Third Avenue Extension in East Greenbush, located in Rensselaer County, New York, in the United States. The east–west highway extends for 1.67 miles (2.69 km) from an intersection with NY 151 east of the Rensselaer city limits to a junction with U.S. Route 4 (US 4) south of the hamlet of Defreestville. NY 915E was designated as New York State Route 381 from the late 1930s to 1962 and part of NY 43 from that time to the late 1990s, when it gained its current designation.

NY 915E begins just east of the Rensselaer city limits at the intersection of Third Avenue Extension and Barracks Road (NY 151) in the town of East Greenbush. NY 151 enters the intersection from the west on Third Avenue and exits to the south on Barracks Road while NY 915E heads to the northeast, paralleling a minor tributary of Mill Creek as it provides access to New Rural Cemetery and several residential housing tracts that lead away from the north side of the road. The land on the south side of Third Avenue Extension, however, is largely undeveloped. Roughly midway between NY 151 and US 4, the street passes under Interstate 90 (I-90).