A pavement marker includes a solar cell assembly arranged between an upper case defined with a sunlight opening and a lower cover formed with a stem portion. Capacitors are connected to a corresponding reverse blocking switch and in series with a corresponding one of the plurality of DC voltage source strings to construct a voltage difference for a corresponding one of the plurality DC voltage source strings. If an entity requests access using an identifier from another namespace, an external database is consulted to determine if a mapping exists for the identifier to another identifier the canonical namespace.