Which of the following is not an area inspected when examining bridge railings?

When inspecting bridge railings, the primary focus is on ensuring safety and structural integrity. Key areas of inspection include the height of the railing above the roadway, which is critical for preventing vehicle encroachments and protecting pedestrians. The condition of the railing material is also vital, as it assesses the physical state of the railing and determines if there is any deterioration or damage that could compromise safety. Additionally, connection integrity is important because it verifies that the railings are securely attached to the bridge structure and can withstand the forces exerted on them during a collision or other impacts.

Post spacing, while it is a design element that can influence the effectiveness of the railing in stopping vehicles, is not typically a primary area assessed during a bridge railing inspection. The spacing is usually predetermined by design standards and regulations, and while it may be noted if it appears problematic, it is not evaluated in the same way as height, material condition, or connection integrity. Therefore, post spacing is not a critical focus during a standard inspection of bridge railings, making it the correct choice for this question.