State Road 1 (SR 1) is a north–south state highway in eastern Indiana, consisting of two segments. Its southern segment begins at U.S. Highway 50 and Interstate 275 in east-central Dearborn County, just east of Lawrenceburg, and ends at Interstate 469 south of Fort Wayne. Its northern segment begins at Interstate 69 on Fort Wayne's north side, and ends at U.S. Route 20 in east-central Steuben County, approximately 6 miles (9.7 km) east of Angola.

U.S. Route 50 (US 50) is a part of the United States Numbered Highway System that runs from West Sacramento, California, to Ocean City, Maryland. In the U.S. state of Indiana, it is part of the state road system. US 50 enters the state in Vincennes. The 171.38 miles (275.81 km) of US 50 that lie within Indiana serve as a major conduit. All of the highway is listed on the National Highway System. Various sections are rural two-lane highway, urbanized four-lane undivided highway and one-way streets. The easternmost community along the highway is Lawrenceburg at the Ohio state line. US 50 passes through urban areas, farmland and woodland.