Which of the following describes the transport index of a package of radioactive material?

The transport index of a package of radioactive material refers specifically to the highest level of radiation expected at one meter from the surface of the package. This measurement is crucial for ensuring safety during the transportation of radioactive materials, as it helps to assess the potential exposure risk to individuals and the environment. By understanding the radiation levels associated with the package, it allows for proper labeling, handling, and transportation measures to be implemented to minimize hazardous exposure.

The other choices do not accurately define the transport index. The total weight of the package, for example, does not inform about radiation levels and is not related to how it should be handled from a safety standpoint. Similarly, the amount of radioactive material inside does not provide a direct measure of radiation exposure at a certain distance, and the type of packaging used may influence safety but does not define the transport index itself.