Interstate 235 (Oklahoma)

Interstate 235 (I-235) is an auxiliary route of Interstate 35 (I-35). Located in Oklahoma City, the freeway runs concurrent with (U.S. Route 77 (US 77). It is part of the Interstate Highway System and provides access to the Downtown and North Central areas of the city. I-235 has a north/south alignment and connects the I-35/Interstate 40 (I-40) junction to Interstate 44 (I-44). The freeway then continues north as the Broadway Extension to the suburban city of Edmond.

Planning for the route began in 1972, then called the Central Expressway. City officials initially faced issues in funding the route until it was given an interstate designation in 1976. After this, further problems acquiring the right of way delayed the project for extended periods of time for civil rights issues. The route was ultimately improved in 1981 with construction beginning two years later. Phase 1 opened in 1984, although the full route was not completed until 1989. It was renamed the Centennial Expressway to coincide with the 100-year anniversary of the Oklahoma Land Rush.