What does the Transportation Index (TI) measure?

The Transportation Index (TI) is a specific measurement used to indicate the maximum radiation level that can be expected at a distance of one meter from a package containing radioactive materials. It is a critical factor in ensuring safety during the transport of these materials, as it helps determine the level of radiation exposure to anyone handling or being near the package. A higher TI signifies a greater potential radiation exposure, thus necessitating stricter safety procedures and considerations during transport.

Understanding the TI is essential for compliance with regulations and for minimizing health risks associated with the transportation of radioactive substances. Therefore, the correct answer reflects the primary function of the Transportation Index in safety protocols for transporting radioactive materials.