| Abstract: | The objective of this research is to provide guidance to project stakeholders for the sequencing and placement of noise walls and retaining walls. The research included examining noise and retaining wall selection, standards and specifications, preferred methods and best practices for sequencing and placement, and design and construction procedures. Meetings were conducted with TxDOT district and division officials to review existing practices, identify issues, and document recommendations. Data related to noise walls were analyzed related to noise walls and the project development process. Active TxDOT projects were selected as case studies to document issues and best practices. The research documented key challenges and developed recommendations for use. Areas of recommendation include spacing, utility coordination, earlier and wide ranging involvement of stakeholders, right of way considerations, and alternative wall types and materials. Updates for TxDOT manuals are also presented. The research can be used by project stakeholders to assist in the sequencing and placement of noise walls and retaining walls and can be used to lessen the impact of noise walls and retaining walls on the overall project development process, including design, construction, and maintenance. |
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