Which traffic safety feature is NOT considered when appraising bridge railings and approaches?

When appraising bridge railings and approaches, the assessment focuses on various aspects that contribute to their effectiveness and safety. The condition of corrosion or collision, while important for the overall maintenance of the bridge structure, is not specifically a feature assessed solely for traffic safety. This option pertains more to the structural integrity and longevity of the bridge, rather than the immediate safety features that protect vehicles and pedestrians.

Railing height regulations are critical safety features, as they are designed to ensure that railings are high enough to prevent vehicles from falling off the bridge. Additionally, the material type used for railings is significant because certain materials may offer better durability and impact resistance, thus enhancing safety. Lastly, visual visibility during day and night is crucial for ensuring that drivers can see the railings in various lighting conditions, which directly affects their ability to navigate safely.

In this context, the correct answer identifies that the condition of corrosion or collision does not directly pertain to the traffic safety features essential for appraising bridge railings and approaches. Instead, this aspect is more relevant to structural assessments rather than immediate safety features that support traffic management.