U.S. Route 42

U.S. Route 42
U.S. Route 42
	US 42 highlighted in red
Route information
Length	349.92 mi (563.14 km)
Existed	1926–present
Major junctions
West end	US 31E / US 60 in Louisville, KY
	I-64 in Louisville, KY; I-71 / I-75 in Florence, KY, Fort Mitchell, KY, Covington, KY, and Cincinnati, OH; I-71 in Cincinnati, OH, Middleburg Heights, OH, and Cleveland, OH; I-70 near London, OH; I-80 in Strongsville, OH; I-90 in Cleveland, OH;
North end	US 6 / US 20 / US 322 / US 422 in Cleveland, OH
Location
Country	United States
States	Kentucky, Ohio
Counties	KY: Jefferson, Oldham, Henry, Trimble, Carroll, Gallatin, Boone, Kenton; OH: Hamilton, Butler, Warren, Greene, Clark, Madison, Union, Delaware, Morrow, Richland, Ashland, Wayne, Medina, Cuyahoga
Highway system
	United States Numbered Highway System; List; Special; Divided;

U.S. Route 42 (US 42) is an east–west United States highway that runs southwest–northeast for 350 miles (560 km) from Louisville, Kentucky to Cleveland, Ohio. The route has several names including Pearl Road from Cleveland to Medina in Northeast Ohio, Reading Road in Cincinnati, Cincinnati and Lebanon Pike in southwestern Ohio and Brownsboro Road in Louisville. Traveling northeast, the highway ends in downtown Cleveland and traveling southwest ends in Louisville.

Interstate 71 (I-71) fully supplanted US 42 as an interurban highway in the early 1960s, relegating US 42 to its current role as an ordinary town-to-town surface road. Additionally, I-71 passes through Columbus, whereas US 42 bypasses Columbus. It remains intact as a route; no part of it has ever been diverted to any Interstate highway. It is not the "parent" of any US route with a related number.

In spite of its even number, US 42 is posted north–south in Ohio.^[4]

^ Cite error: The named reference KYTC was invoked but never defined (see the help page).
^ Cite error: The named reference GIS was invoked but never defined (see the help page).
^ Ohio Department of Highways and Public Works (August 1, 1926). Map of Ohio Showing State Routes (PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. OCLC 5673562. Retrieved August 15, 2020.
^ Google Street View. Retrieved July 19, 2012.

[KYTC-1] Cite error: The named reference KYTC was invoked but never defined (see the help page).

[GIS-2] Cite error: The named reference GIS was invoked but never defined (see the help page).

[Ohio1926-3] Ohio Department of Highways and Public Works (August 1, 1926). Map of Ohio Showing State Routes (PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. OCLC 5673562. Retrieved August 15, 2020.

[4] Google Street View. Retrieved July 19, 2012.

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