Which roadmap would an employee consult for postal operation policies at their location?

The correct option is Policy Net, as it serves as a comprehensive resource for employees regarding postal operation policies specific to their location. This platform typically includes updated policies, procedures, and guidelines tailored to various postal services, making it an essential reference for employees to ensure compliance with established practices.

While the other options also relate to postal information, they serve different purposes. Handbook PO 209 is a detailed manual focused on a specific aspect of postal operations, but it may not encompass all operational policies across locations. The Postal Bulletin serves as a communication tool for announcements and updates but is not a comprehensive repository of policies. Publication 52 is generally dedicated to regulations related to mailing hazardous materials rather than overarching postal operations. Therefore, Policy Net is the most appropriate resource for consulting postal operation policies directly relevant to an employee's location.