What document outlines the proper format for traffic signal plans?

The correct choice is the Plans Preparation Manual, as this document provides detailed guidelines and standards for creating traffic signal plans. These plans must adhere to specific formatting and content requirements to ensure clarity, consistency, and adherence to regulatory standards. The manual outlines the necessary components that should be included in the plans, such as diagrams, locations of signals, and any associated symbols or notes that communicate the design effectively to contractors and engineers.

While other documents may contain relevant information, they do not specifically focus on the structured format needed for traffic signal plans. For instance, a Traffic Control Plan primarily deals with temporary traffic management and safety measures during roadworks rather than the design specifics of traffic signals. The Construction Manual addresses broader construction techniques and procedures, while the Project Proposal is more about outlining the project scope, objectives, and costs rather than providing formatting guidelines for technical documents. Therefore, the Plans Preparation Manual is the specific resource that professionals should consult for properly formatted traffic signal plans.