A ___________ must be used to identify a structure that cannot be accessed by means of a private road and the building address cannot be viewed from the public way.

In scenarios where a structure cannot be accessed via a private road and its address is not visible from a public way, it's essential to have a way to identify the building for emergency responders and visitors. This identification can be done through various means, and thus multiple options are valid.

Monuments can serve as permanent markers that indicate the location of a building and establish an address for it. Poles are often used to display signage that can be easily seen from a distance. Other approved signs or means can encompass any additional methods that meet local regulations for visibility and accessibility.

Since the question encompasses multiple options that all fulfill the purpose of identifying an inaccessible structure, opting for a choice that includes all possible solutions ensures compliance with identification standards. This approach supports the versatility needed in unique property situations, allowing for effective communication of a building's location.