What information must all crew members verify on their TGBO?

The correct answer involves essential components that ensure crew members are fully informed and prepared for their tasks. Verifying the proper designation ensures that the crew is assigned to the correct train or service, which is crucial for operational safety and efficiency. Confirming the correct number of pages is important to ensure that all necessary information is present and that nothing is missing that could affect the safe and timely operation of the train. Specified routing confirms the track that the train is supposed to follow, which is vital for managing train movements and preventing accidents or delays.

In the context of train operations, each of these aspects directly influences the safety and success of the mission, emphasizing the importance of thorough checks. The other choices contain elements that, while useful, do not encompass the all-around critical verification that is foundational for every crew member's responsibilities. For example, weather forecasts and speed restrictions are certainly important, but they fall under a broader context rather than the initial verification needed specifically on the TGBO (Train General Bulletin Order).