What can high traffic volumes in travel lanes lead to with regard to exposed steel grid decks?

High traffic volumes in travel lanes can lead to broken welds in exposed steel grid decks primarily due to the continuous and repetitive loads imposed by heavy vehicles. As traffic volume increases, the deck experiences higher stress levels and fatigue, particularly at the connections where the grid deck is welded to supporting elements. Over time, these stress accumulations can result in microfractures that enlarge and eventually lead to complete failures or broken welds.

This scenario emphasizes the importance of regular inspections and maintenance, as the integrity of welds is critical to ensuring the overall stability and safety of the bridge structure. Proper monitoring can help identify early signs of distress, allowing for timely repairs before significant failure occurs.