Final answer:
The train operator must follow safety protocols when the signal alternates between STOP and an alternate route aspect in response to traffic densities,
Step-by-step explanation:
The correct answer is that when an alternate route is set that does not allow a return to the original destination, and the signal response alternates between STOP and the aspect indicating the alternate route, the train operator is required to follow specific safety protocols.
This procedure is typically related to the management of traffic densities and ensures that the flow of traffic is controlled safely and efficiently.
Upon encountering a red blinker signal, traffic entering the area must halt, while the traffic proceeding through the area may see a yellow signal, indicating caution but allowing continued movement under specific instructions.
The correct answer is option (28-109). The question is referring to a situation involving traffic control. It mentions an alternate route that does not allow a return to the original destination and a flashing signal to stop and then back to the alternate route aspect.
This scenario is typically seen at traffic circles or roundabouts, where traffic flows in a circular pattern and alternate routes are provided to enter or exit the circle.
In this case, the train operator must follow the flashing signal to stop and then proceed back to the alternate route aspect. This is necessary to maintain a smooth flow of traffic and prevent accidents.
The flashing signal serves as a warning to the train operator to slow down and yield to other vehicles before continuing along the alternate route.
Overall, the question is related to transportation and traffic control, falling under the subject of Social Studies.