Which of the following start-up items must be completed by the contractor prior to the physical construction of the traffic signal?

Prior to the physical construction of a traffic signal, it is crucial for contractors to complete several start-up items to ensure a smooth and efficient process.

Utilities notification and coordination is vital because it helps prevent any disruptions related to existing underground utilities that could pose dangers or lead to costly delays if not addressed before construction begins. This step ensures that utilities are aware of the upcoming work and can make necessary adjustments.

Public awareness as required by the agency is also an essential part of the pre-construction phase. This process involves informing the public and relevant stakeholders about the forthcoming construction, which aids in reducing traffic disruptions and increasing community awareness. Proper communication helps manage public expectations and enhances safety.

Approval of the traffic control plan is necessary to ensure that there are adequate safety measures in place for both the construction team and the public during the installation of the traffic signal. A well-structured traffic control plan provides guidance on how to manage traffic flow and safety while construction activities are ongoing.

Since all of these items are fundamental to the successful initiation of traffic signal construction, completing them before beginning physical work is a best practice and often mandated by regulatory agencies. Therefore, the choice indicating that all these start-up items must be completed is the correct one.