What does the term "downstation" refer to?

The term "downstation" refers to the direction of measurement, particularly in the context of paving and construction. In surveying and project management, "downstation" indicates the downstream or lower-elevation point in a project. It is crucial for establishing reference points and ensuring that measurements are consistent throughout the construction process. Understanding this term helps workers and project managers accurately communicate and align their efforts in positioning, grading, and laying asphalt.

In contrast, the other options do not align with the conventional use of "downstation" in paving terminology. It does not specifically refer to materials, project completions, or reporting methods, which are distinct aspects of project management and construction but unrelated to the directional measurement intended by the term "downstation."