A traffic signal plan sheet will display an ___________________ that shows specific symbols and their meanings in the signal drawing.

A traffic signal plan sheet is a critical part of civil engineering and urban planning that communicates essential information through symbols. The correct answer, "Legend," refers to a section on the plan sheet that provides a clear description of the symbols used in the drawings. This helps anyone reading the plan to quickly understand what each symbol represents, such as types of signals, signs, and other features relevant to the traffic system being depicted.

A legend typically includes graphical representations alongside their corresponding labels, ensuring clarity and facilitating effective communication among engineers, city planners, contractors, and other stakeholders involved in traffic signal design and implementation. By using a legend, the plan sheet maintains organization and prevents confusion that could arise from unfamiliar symbols, making it easier for all parties to interpret the plan accurately.

While other terms like "Index," "Key," and "Guide" might refer to various forms of information displayed in different contexts, in the specific case of traffic signal plans, "Legend" is the most precise term that indicates a visual explanation of symbols used in that particular drawing.