What component directs the runoff water to the inlets on a bridge?

The component that directs runoff water to the inlets on a bridge is the grade and cross slope. This aspect of bridge design focuses on the physical geometry of the roadway surface. Proper grading and cross slope ensure that water flows away from the center of the bridge deck towards the edges and into drainage inlets.

This is crucial for maintaining safety and structural integrity, as standing water on a bridge can create hazardous conditions for vehicles and may lead to erosion or damage over time. The design effectively channels water, minimizing the risk of water pooling on the surface.

Other components, such as expansion joints, support beams, and pavement markings, serve different functions. Expansion joints accommodate movement and thermal expansion, support beams provide structural integrity, and pavement markings enhance visibility and safety for drivers. However, none of these components have a direct role in managing water runoff like the grade and cross slope do.