Although project closeout only entails a small portion of actual construction work, closing out highway construction projects for state departments of transportation (DOTs) is a complex and vital process that is a part of project delivery for highway construction projects. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 570: Practices for Closing Out Highway Projects from Substantial Completion to Final Payment compiles and documents information regarding the current state of the practice for closing out highway projects from substantial completion to final payment.