American Association of State Highway Officials, U.S. Route Numbering Sub-Committee Agenda (1970)
“ OHIO I-80 Addition APPROVED. Add to the Interstate System and designate as Route I-80 that portion of the Ohio Turnpike between the interchange of S.R. 10 in Lorain County and the interchange at I-14. Redesignation as I-480 that portion currently designated as I-80 from S.R. 10 to S.R. 14. PENNSYLVANIA I-79 Elimination & Relocation APPROVED. Eliminate the designation I-79 from the current junction of I-79 and I-279 in Pittsburgh, thence easterly to the intersection of I-76 and northerly to the intersection of I-79 and I-279 north of Pittsburgh. ”
