This project will evaluate sub-regional corridor-scale multimodal planning processes in California that aim to improve multi-modal access and mobility for reaching desired destinations (e.g. homes and residences). Research has demonstrated that transit and active transport use can be enhanced through coordinated planning of facilities and services on a corridor and/or travel network basis, especially when also coordinated with land use strategies. With some new and ambitious corridor/mobility-hub planning efforts currently underway in California, now is a good time to evaluate what makes them succeed or fail. Although the potential benefits from such strategies have been shown to be substantial, corridor-plus-station area planning faces considerable challenges, many of which concern the challenges of institutional coordination. Yet scant research has examined governance challenges of multimodal planning in California. This research project will address this neglected yet critical topic through case study analysis of selected current and past sub-regional corridor planning efforts in California. Through public documents analysis and interviews with stakeholders, the project will examine and compare the selected planning processes in relation to: stakeholders involved; goals, objectives, and operational measures established; planning and analytical processes/procedures pursued; stakeholder interests and concerns; policies, programs, and projects adopted and funded for implementing the objectives; and outcomes achieved (including measurable impacts for mode choice, VMT (Vehicle Miles Traveled), and access and mobility to desired destinations by mode). The project will identify best practices and obstacles and pitfalls for effective corridor planning and consider how the state government can support multimodal corridor planning, as these plans support the transformation of the transportation networks they cover by improving access to transportation modes and increasing travel mobility to desired destinations.