[6] Mitchell, a U.S. Marine and Loveland resident, served in the War in Afghanistan and died in a helicopter crash in Helmand Province on October 26, 2009.

[8] Estle, a U.S. Army sergeant first class who was born and raised in Ohio, was a 1991 graduate of Lebanon High School in which he was in the Junior ROTC, and attended the Warren County Career Center.

He served in support of Operation Enduring Freedom in the War in Afghanistan and was killed in action in 2012 at the age of 38, ten days before he was due to return home.

[9] In 2020, SR 48 (Far Hills Avenue) between Stroop Road and Dorothy Lane in Kettering was additionally designated as the CWO3 James E. Groves III Memorial Highway.

[10] Groves, a U.S. Army chief warrant officer three and instructor pilot, was a Columbus native who moved to Kettering as a child and graduated from that city's Fairmont High School in 1994.

The city has commissioned studies which, among other improvements, evaluated the roundabout treatment as part of an analysis of the installation and maintenance costs of traffic light replacements along its entire portion of the state route.

[15][16][17][18] On December 4, 2023, despite having been notified by the state that $3 million (more than half the construction costs), were to be made available, the city council unanimously voted to suspend the roundabout project.

[19][20] In 2021, the Ohio Department of Transportation (ODOT) awarded the city of Dayton $4.74 million to place SR 48 (North Main Street) on a "road diet".

Dayton, ODOT District 7 and the Miami Valley Regional Planning Commission had hired the engineering firm Burgess & Niple to study the roadway from Great Miami Boulevard in Dayton north to Shiloh Springs Road in Harrison Township, Montgomery County.

The study area was shortened on the north end to Shoup Mill Road in Harrison Township, a distance of 3.5 miles (5.6 km); this stretch between 2017 and 2019 had 760 crashes, 34 involving pedestrians, and a daily traffic count of 18,400 vehicles.

[21][22][23][24] On December 7, 2023, ODOT announced that it would provide a $3.66 million grant to convert the current traffic light-controlled intersection at SR 48 and Lytle-Five Points Road in Clearcreek Township, Warren County to a roundabout in 2028.

[25] In I Love Lucy episode #111, "First Stop", the Ricardos and the Mertzes travel this route on their trip to Hollywood, although they were headed to Cincinnati.