The nation’s freight shippers, receivers, and carriers depend on transportation agencies to provide new highway capacity to meet the demands of growing domestic commerce and international trade. Yet, the traditional highway planning process has not broadly engaged these freight stakeholders in the planning process. As state departments of transportation (DOT) and metropolitan planning organizations (MPO) make efforts to improve the quality of their interaction with the freight community, SHRP 2 C15, Integrating Freight Considerations in Additions to the Highway Capacity Planning Process, offers timely guidance and best practices examples. Strategic Highway Research Program 2 (SHRP 2) C15 was developed primarily through interviews and case studies collected through discussions with public and private-sector freight stakeholders across the U.S. The case studies and other research culminated in a guide that utilizes the four-phase SHRP 2 highway planning framework to help agencies know when, how, and who to engage from the freight stakeholder community at each stage: Long-Range Transportation Planning, Corridor Planning, Programming, and Environmental Planning and Permitting.