Which of the following is NOT a stage of drawbridge preemption?

The stage of drawbridge preemption is a critical component in managing traffic flow when a drawbridge is in operation. The stages typically involve specific actions designed to facilitate and ensure safety during the bridge's opening and closing process.

The correct answer relates to the concept of "immediate reopening of the bridge." This is not considered a stage of drawbridge preemption. Instead, drawbridge preemption involves preparation for the bridge opening by clearing the bridge opening area, potentially omitting traffic signal phases during the opening to prevent vehicle conflicts, and modifying phase timing to enhance safety as the bridge returns to its normal position.

Each of these stages is essential for managing traffic effectively when a drawbridge is in operation. They contribute to an orderly and safe transition during the intersection's traffic signal changes. The "immediate reopening" of the bridge, while logically appealing as a response to clear traffic, is not a recognized official stage within the protocols for safely managing the drawbridge operation, as it does not account for the necessary safety measures and procedures that must be taken before allowing traffic to proceed back over the bridge.