@BOOK{NAP22096, author = "Transportation Research Board and National Academies of Sciences, Engineering, and Medicine", editor = "Eric M. Kerness and Kurt Dettman", title = "Permissible Changes in Scope of Work for Construction Contracts", doi = "10.17226/22096", abstract = "TRB\u2019s National Cooperative Highway Research Program (NCHRP) Legal Research Digest 67: Permissible Changes in Scope of Work for Construction Projects explores whether there are statutory, procedural, or legal tests to determine when the issuance of a contract modification is permissible. This digest will cover the following topics: the policy issues underlying restrictions on contract modifications; state and federal statutes and regulations affecting contract modifications; case-law defining tests and examples of where contract modifications triggered competitive bidding requirements; the importance of including contract modification provisions in construction contracts; and case studies of how representative state departments of transportation determine the permissibility and scope of contract modifications versus competitive bidding.", url = "https://nap.nationalacademies.org/catalog/22096/permissible-changes-in-scope-of-work-for-construction-contracts", year = 2015, publisher = "The National Academies Press", address = "Washington, DC" }