State Route 127 is a state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in the state of Utah

Utah

Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

 that spans 2.507 miles (4.035 km) within Syracuse

Syracuse, Utah

Syracuse is a city in Davis County, Utah, United States, between the Great Salt Lake and Interstate 15, about north of Salt Lake City. It is part of the Ogden–Clearfield, Utah Metropolitan Statistical Area.Syracuse was incorporated on September 3, 1935....

 in Davis County

Davis County, Utah

Davis County is a county located in the U.S. state of Utah. As of 2010 the population was 306,479, a 28.2% increase over the 2000 figure of 238,994. It was named for Daniel C. Davis, captain in the Mormon Battalion. The county is part of the Ogden–Clearfield Metropolitan Statistical Area as...

.
The western terminus of the route is at the intersection of SR-110

Utah State Route 110

State Route 110 is a state highway in the U.S. state of Utah, connecting SR-127 in Syracuse with SR-37 in West Point.-Route description:...

 (4500 West) and 1700 South (west of SR-127, 1700 South becomes the Davis County Causeway, a causeway

Causeway

In modern usage, a causeway is a road or railway elevated, usually across a broad body of water or wetland.- Etymology :When first used, the word appeared in a form such as “causey way” making clear its derivation from the earlier form “causey”. This word seems to have come from the same source by...

 over the Great Salt Lake

Great Salt Lake

The Great Salt Lake, located in the northern part of the U.S. state of Utah, is the largest salt water lake in the western hemisphere, the fourth-largest terminal lake in the world. In an average year the lake covers an area of around , but the lake's size fluctuates substantially due to its...

 that provides access to Antelope Island

Antelope Island

Antelope Island, with an area of , is the largest island of 10 islands located within the Great Salt Lake, Utah, United States. The island lies in the southeastern portion of the lake, near Salt Lake City and Davis County, and becomes a peninsula when the lake is at extremely low levels. Antelope...

). The route continues east until it ends at SR-108

Utah State Route 108

State Route 108 is a state highway in the U.S. state of Utah that spans in Davis and Weber Counties. The road connects I-15 and Layton to Syracuse and Clinton before terminating at SR-126 in Roy...

 (2000 West), while 1700 South continues east along SR-108.
The part of 1700 South east of 2000 West in Syracuse was added to the state highway system in 1931 as SR-108, a designation it still carries.