Which component is critical in linking a bridge deck with the road surface?

The approach slab is a critical component that connects the bridge deck with the road surface. This slab serves as a transition between the elevated structure of the bridge and the existing ground level of the roadway. Its primary role is to minimize any unevenness or bump that could occur at the junction of the bridge and the road, providing a smoother driving experience and ensuring the structural integrity of the roadway as it approaches the bridge.

In addition to facilitating a seamless transition for vehicles, the approach slab also helps to absorb any minor movements that may occur due to vehicle loads, temperature changes, or ground settling. By effectively linking the bridge deck to the road surface, the approach slab aids in distributing loads more evenly and enhancing the overall safety and functionality of the bridge structure.