This paper presents broad spectrum of considerations in the planning and design phases for utilization of space above the CA/T tunnel. The issues include land planning and zoning, utilities, traffic management, structural design, geo-technical features and environmental commitments. Specifically this paper focuses on the structural design considerations and other details for the deepest section of CA/T which begins at Kneeland Street and ends at Congress Street. This section of CA/T tunnel supports the MBTA's South Boston Pier Transitway tunnel for electrically operated buses. The Transitway tunnel crosses the Red Line subway at the South Station, thus forming three tier tunnels at Summer Street intersection.
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机译：本文介绍了规划和设计阶段的广泛考虑因素，以利用CA / T隧道上方的空间。这些问题包括土地规划和分区，公用事业，交通管理，结构设计，地质技术特征和环境承诺。具体而言，本文重点介绍了CA / T最深部分的结构设计考虑因素和其他细节，从奈斯兰街开始，在国会街道结束。 CA / T隧道的这一部分支持MBTA的南波士顿码头Transitway隧道，用于电动公共汽车。 Transitway隧道穿过南站的红线地铁，从而在夏季街道交叉路口形成三层隧道。
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