What is covered in the M-41 Handbook?

The M-41 Handbook, which is specifically designed for City Carriers, provides comprehensive guidance on various aspects of mail delivery, including the structure and management of delivery routes. One of its primary focuses is on the operational procedures for carriers, including indications of how to handle deliveries that may be added or deleted from established routes, along with any necessary adjustments to the line of travel. Understanding these aspects is crucial for city carriers, as it enables them to efficiently navigate changes in their delivery responsibilities and ensures that they can maintain service standards.

The other options, while relevant to various operations or guidelines, do not align with the specific content area that the M-41 Handbook covers. The first option about mail preservation methods is more aligned with different postal regulations concerning package handling rather than route management. The second option regarding hazardous materials pertains to safety guidelines that are provided through different training resources. Finally, customer service interactions are generally found in other handbooks focused on customer relations rather than the route management specifics that the M-41 encompasses. Thus, the inclusion of updated delivery information in the M-41 Handbook is essential for city carriers to manage their responsibilities effectively.