What condition is a Portable Changeable Message Sign (PCMS) considered if 90% of the pixels are functional?

A Portable Changeable Message Sign (PCMS) is categorized based on the functionality of its display pixels. If 90% of the pixels are functional, it indicates that the majority of the display is working well, but there is still a significant portion of the sign—specifically 10%—that is not functional.

In the context of interpreting the condition of the sign, "Marginal" is fitting because although the majority of the pixels are operational, their non-functionality can hinder the effectiveness of the sign's message. This percentage means that while the sign remains operational, it isn't performing optimally, leading to possible confusion or miscommunication with drivers who rely on clear and complete messages for safety and guidance.

"Excellent" would imply that the sign is functioning without issue, while "Poor" suggests that a vast majority of the pixels are unusable, which isn't the case here. "Acceptable" may not encapsulate the nuance that there is 10% inoperability that could impact clarity, thus resonating less effectively than "Marginal."