What is the best procedure for operating a passenger train past successive grade time signals?

Holding speed as nearly constant as possible is the best procedure for operating a passenger train past successive grade time signals. This approach ensures that the train maintains a steady pace, which can help in scheduling and allow the crew to manage train dynamics effectively.

By minimizing speed fluctuations, the train can be operated more efficiently, avoiding the need for frequent speed adjustments that could lead to discomfort for passengers. Consistency in speed also aids in adhering to timetables, thus improving overall operations and reliability.

In contrast, accelerating slightly at each signal could lead to unnecessary variations in speed, which might not be optimal for passenger comfort or adherence to schedules. Reducing speed below the limit at each signal risks delaying the train unnecessarily, resulting in inefficient operation and potential scheduling conflicts. Stopping at each signal for safety checks is impractical in this context, as the idea is to keep the train moving efficiently past multiple signals without frequent interruptions.