<p>The Highway Corridor Transformation Research Study - Proof of Concept report was commissioned by the Pennsylvania Department of Transportation and the US Department of Transportation. The objective was to provide proof of the concept that a holistic approach to corridor transportation planning can be a model for mixed use, multimodal transportation corridors that is replicable throughout the Commonwealth of Pennsylvania and beyond. The report includes a definition of corridors, discusses influences on future corridor planning and design, questions current planning practices that conflict with multimodal implementation, and recommends a corridor classification system that parallels PennDOT's Roadway Typologies and gives further definition...