In order to use the TMS, users must be assigned at least one ________.

To utilize a Transportation Management System (TMS) effectively, users must be assigned at least one role. Roles govern what permissions and functionalities users have access to within the system, defining their responsibilities and the tasks they can perform. This is vital for maintaining security and ensuring that users have the appropriate level of access based on their job functions. By having defined roles, the TMS can streamline operations and enhance user experience, as each user will have access tailored to their specific needs and responsibilities within the transportation management process.

In contrast, the other options—route, enterprise, and contract—are elements that may be configured or utilized within the system once access is granted, but they do not establish the necessary permissions for the user to operate within the TMS. Roles, therefore, are foundational for user access and usage of the system.