The longer segment starts at Tell City on the Ohio River and ends in Bloomington in south central Indiana.The other segment in northeastern Indiana runs from I-469 near Fort Wayne to the Ohio state line.However, from this point north to Bloomington, the character of the road changes to become a major rural arterial route.US 50 and SR 37 then run concurrently, curving northeast to cross the East Fork of the White River before turning north to bypass the center of the city on its west side.The portions of SR 37 between Tell City and I-64, and from Paoli to Bedford, were designated as the Frank O'Bannon Highway, to honor the late former governor, following his death in 2003.In the 1950s, SR 37 ran north of Bloomington on the roads now called Cascades Drive and Old 37 to the northern end of Monroe County.These were replaced in the late 1950s and early 1960s with the straighter sections called College Avenue and Walnut Street north of Bloomington and the sections called Walnut Street and Old 37 (Kentucky Hollow Road) south to Oolitic.Before 2024, SR 37 ran continuously from the northern end of the southern segment at I-69 southwest of Bloomington north to the Indianapolis area.[7] SR 13 followed Meridian St. (US 31) north to Fall Creek Parkway N. Drive, where it turned northeast.SR 37 then was rerouted along 82nd Street to Allisonville, where it turned south to connect to Fall Creek Parkway has it had for the previous 35 years.Some unofficial maps listed Bluff Road as SR 37A for some time after this, although the state of Indiana never recognized it as such.East of downtown, SR 37 departed the pairing with US 24/SR 14, turning north onto Anthony Boulevard to cross the Maumee River.Roughly 1.5 miles (2.4 km) later, the route turned northeast onto Crescent Avenue, which becomes Stellhorn Road at Hobson Road/St.To improve traffic flow along SR 37 north of where it branches off I-69, the communities of Fishers and Nobleville started a project to reconstruct drainage lines and remove five signalized intersections.[21] Work on the drainage lines was started in September 2018 and completed by February 2020 while the 135th Street intersection was converted to a pair of right-in/right-outs.[23] A timeline for construction of the interchange was to be provided once project bids are made in summer 2023,[23] and was tentatively scheduled to begin in September 2023 and be completed by October 2025.[32][33] The state highway commission removed the last segment of SR 37A in Marion County in either late 1972 or early 1973.The route then interchanged with Interstate 465 (I-465 exit 35), followed by intersections with 86th, 91st, and 96th streets, then crossed into Hamilton County and the town of Fishers.
The at-grade intersection of SR 37 and Southport Road in Indianapolis in 2013; it was reconstructed as a
diamond interchange
for I-69.