Washington State Route 171

State Route 171
Broadway Avenue
SR 171 is highlighted in red.
Route information
Auxiliary route of SR 17
Maintained by WSDOT
Length	3.79 mi[1] (6.10 km)
Existed	1964[2]–present
Major junctions
South end	I-90 in Moses Lake
Major intersections	I-90 BL in Moses Lake
North end	SR 17 in Moses Lake
Location
Country	United States
State	Washington
Counties	Grant
Highway system
State highways in Washington Interstate US State Scenic Pre-1964 1964 renumbering Former
← SR 170 → SR 172

State Route 171 (SR 171, named Broadway Avenue) is a 3.79-mile (6.10 km) long state highway serving the city of Moses Lake in Grant County, located in the U.S. state of Washington. Broadway Avenue begins at an interchange with Interstate 90 (I-90) and travels northeast through Downtown Moses Lake concurrent to Interstate 90 Business and parallel to Parker Horn before ending at an intersection with SR 17. Broadway Avenue was previously part of Primary State Highway 18 (PSH 18) and U.S. Route 10 (US 10) until the 1964 highway renumbering. The highway also has an un-built extension from Moses Lake northeast to Odessa that was first legislated in 1955 as Secondary State Highway 7E (SSH 7E).