California will begin construction of a proposed high speed rail system in the San Joaquin Valley in 2013, which will ultimately connect to Los Angeles and San Francisco. If implemented poorly, however, the system could lead to unchecked development in the Valley that could increase traffic, exacerbate the loss of farmland, and generate more air pollution. To avoid this outcome, our eleventh paper in this series recommends a Valley-wide collaborative to create a plan for economic growth and environmental preservation around the high speed rail network, support for local planning and mitigation efforts to implement it, and new financing mechanisms to catalyze private investment in station-connected development.