The purpose of this report is to address the requirements of the Federal Highway Administration (FHWA) Interstate Access Policy as it relates to a proposed interchange between I-89 and VT State Route 116 in South Burlington, VT (Exit 12B). It will be used to seek preliminary approval of a new access to the interstate from FHWA and provides information that will support the continued planning and analysis of the proposed project. The FHWA Interstate Access Policy was established to ensure that new access points achieve their intended purpose without significantly reducing the ability of the interstate to safely and efficiently accommodate through traffic. To satisfy the FHWA Access Policy, an Interstate Access Justification Report (IJR) must be prepared that provides the analyses necessary to address eight requirements that define the approach to the study and are generally related to traffic operations and safety, transportation planning and land use planning.