In the 1820s, Colonel James Kilborne, a representative in the Ohio General Assembly, lobbied heavily for a road to connect Columbus to Lake Erie. In 1826 the legislature approved the creation of the Columbus & Sandusky Turnpike Company to build a turnpike 106 miles long that opened in 1834. The Ohio Inter-County Highways were created on June 9, 1911, with the passage of the
McGuire Bill (Senate Bill 165, 79th
Ohio General Assembly). Main Market Roads, the most important of the system, were defined on April 15, 1913. In 1923 the
numbering system was simplified. It was
altered further in 1927 in order to accommodate numbers in the
United States Numbered Highway System. In 1935 the Ohio General Assembly passed a law which added 5,000 miles of roads to the state highway system over a 12-month period. These roads were assigned route numbers in the 500s, 600s, and 700s. In 1962
certain numbers were retired to accommodate numbers in the
Interstate Highway System. ==Highway systems==