Professional land surveys are often required by LGs or TxDOT as part of the design process in order to identify site conditions and limitations for the project. Surveying may be required for both construction and non-construction projects but is most commonly a part of construction projects. Requirements for design surveys are discussed in the corresponding Design Surveys section of the , while requirements for right-of-way surveys are discussed in Chapter 6 – Right of Way and Utilities of both the and Guide.