Traffic operations plan
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IntroductionThis document is the Traffic Operations Plan for the Massachusetts Highway Department (MassHighway) Regional Traffic Operations Center (RTOC). The primary objectives of the RTOC, which will cover the greater Boston metropolitan area, are the following: Improve safety by warning drivers approaching slow or stopped traffic, reducing the number of incidents. Maximize capacity of the region’s roadways by managing recurrent and non-recurrent congestion. Facilitate coordination with emergency management services, including the Massachusetts Emergency Management Agency (MEMA), the State Police, and local city emergency services. Provide information and support for the dissemination of real-time traveler information to the public. The high-level intent of the RTOC central software subsystem is to achieve these goals, and the purpose of this document is to define the proposed logic and functions of the traffic operations portion of the central software. This document will therefore serve as the basis for the software functional design that will follow in a later task. Section 2 of this document summarizes the current existing traffic operations of the RTOC. Section 3 presents the recommended traffic operations that will form the basis of the central software for the RTOC. These traffic operations are based on the existing IBI Group Traffic Management System (TMS) software application, with consideration of the existing MassHighway practices (reviewed in Section 2) and the requirements of Request for Response (RFR) and MassHighway/IBI Group contract. A glossary of terms and acronyms used in this document can be found in Appendix A. It is essential that the existing operational procedures followed at the interim RTOC be understood in order to recommend traffic operations principles and procedures that will form the basis of the software to be developed. This information has been obtained from documentation of current procedures provided by MassHighway and from meetings with MassHighway operations personnel. Based on the material provided and the meetings, a number of flow diagrams have been developed that trace the RTOC’s operations through the various stages of RTOC response to events. It should be noted for the purpose of this summary, events include: accidents; disabled vehicles; road debris; weather incidents; HOV activities; planned and unplanned construction activities; and any other incidents that may affect traffic. The following sub-sections explain the various stages of events and include the corresponding flow diagrams. The different interfaces represented in the diagrams include: 
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