"full or partial" access control and "generally" has grade separations at intersections; a freeway is then defined as an expressway with full access control. Ohio's statute is similar, but instead of the vague word "generally," it imposes a requirement that 50% of an expressway's intersections must be grade-separated for the term to apply. Only Minnesota enacted the exact MUTCD definitions, in May 2008. However, many states around the Great Lakes region and along the Eastern Seaboard have refused to conform their terminology to the federal definition. The following states officially prefer the term expressway instead of freeway to describe what are technically freeways in federal parlance: Connecticut, Florida, Illinois, Maryland, and West Virginia. In those states, it is common to find Interstate highways that bear the name expressway. Ultimately, it is the federal definition that defines a road's classification whether it is an expressway or freeway no matter the preferred term. No state, for instance, could have what is technically an expressway given Interstate status just because semantically they use the term interchangeably with freeway. Most expressways under the federal definition have speed limits of 45-55 mph (70–90 km/h) in urban areas and 55-70 mph (90–110 km/h) in rural areas. Urban expressways are usually free of private driveways, but occasional exceptions include direct driveways to gas stations and shopping malls at major intersections (which would never be allowed on a true freeway). The vast majority of expressways are built by state governments, or by private companies, which then operate them as toll roads pursuant to a license from the state government. A famous example of a local government getting into the expressway business is Santa Clara County in California, which deliberately built its own expressway system in the 1960s to supplement the freeway system then planned by Caltrans. Although the county originally planned to upgrade the expressways into full-fledged freeways, such a project became politically infeasible after the rise of the tax revolt movement in the mid-1970s, which began with California Proposition 13 in 1978. South America Brazil In Brazil, an expressway is known as Via Expressa and its function is to connect the most important streets and avenues of certain cities with their adjacent highways. Because of this, some expressways are numbered (in the same way as highways). According to the Código Brasileiro de Trânsito (Brazilian Traffic Code), expressways are officially defined as Vias de Trânsito Rápido (Rapid Transit