What does the M-41 refer to in postal terms?

The M-41 refers to a route map used by postal carriers, particularly for City Carrier Assistants (CCAs) and regular city carriers. This document provides detailed instructions and route information that helps carriers delivery mail efficiently. It includes comprehensive details about the specific routes, delivery points, and the organization of mail delivery areas, ensuring that carriers can navigate their routes effectively and adhere to postal regulations. This tool is essential for optimizing delivery performance and maintaining overall workflow within postal operations.

The other options, while relevant to postal operations, do not accurately describe the M-41. Mail processing, packaging guidelines, and classification codes serve different functions within the postal system, but they do not define the role and purpose of the M-41 specifically as a route map for carriers.