Which of the following is NOT necessary for transporting hazardous materials?

Transporting hazardous materials requires strict adherence to safety protocols and regulations to ensure the safety of both the transporter and the public. One critical component of this is having proper shipping documents, which provide essential information about the nature of the materials being transported, including their classification and handling requirements. Additionally, emergency response information is crucial in case of an incident, as it guides responders on how to safely manage a spill or other emergency involving hazardous materials. Vehicle warning signs are also required to alert others on the road about the presence of hazardous materials, facilitating safer interactions with other vehicles and emergency personnel.

In contrast, a passenger's travel plans are not a requirement for the transportation of hazardous materials. This information does not pertain to the safety measures or regulatory compliance necessary when handling hazardous substances. Thus, it is not considered essential information needed in the transportation process.