What is used to determine the exact location and measurements needed to design a highway?

Field surveys are essential for determining the exact location and measurements needed to design a highway. These surveys involve the direct gathering of data on the physical features of the land, including elevation, contours, and existing structures. The information collected during field surveys is critical for engineers and designers to ensure that the highway aligns appropriately with the natural landscape and meets specific design standards.

Field surveys provide accurate, detailed, and real-time data that aids in assessing land boundaries, grading, drainage, and other necessary elements in the design process. This level of precision is unmatched by other methods, which may rely on interpretation or estimation. Therefore, for highway design, field surveys are the most reliable source for obtaining the necessary measurements and location information.