TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-C12-RR-1: The Effect of Public-Private Partnerships and Non-Traditional Procurement Processes on Highway Planning, Environmental Review, and Collaborative Decision Making explores the different points in the overall project development process when public-private partnership involvement can be introduced. The report also explores other types of non-traditional contracting arrangements and their impact on the project development process as set forth in the PlanWorks (formerly Transportation for Communities - Advancing Projects through Partnerships (TCAPP)) Decision Guide.