SR 327 was commissioned in 1932, routed between Roads and Wellston.[2][3] In 1935 the highway was extended north to Adelphi.[4][5] The highway was extended south to US 35 in 1937.[6][7] In 2002, work began on replacing an at-grade intersection at SR 32 into an interchange south of Wellston. The $9 million project was funded jointly by the Federal Highway Safety Infrastructure program and ODOT's Highway Safety Program (HSP).[8] The project was completed in July 2004 at a cost of $12.5 million, an increase of $3.5 than originally estimated. It also rerouted SR 124 in a brief concurrency.[9][failed verification]
^Ohio Department of Highways (1936). Official Highway Map of Ohio(PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways. OCLC5673562. Retrieved October 29, 2013.