State departments of transportation (DOTs) must develop long-range transportation plans (LRTPs) and State Transportation Improvement Programs (STIPs) as key products of the transportation planning process. DOTs have a long history of developing these documents through many cycles of planning. NCHRP Synthesis 631: Integrating Performance-Based Planning into Long-Range Transportation Plans and STIPs , from TRB’s National Cooperative Highway Research Program, documents current practices of state DOTs relate…