What is the headroom under brides?

In the context of architecture or design, "headroom under bridges" refers to the vertical space available beneath a bridge, which is crucial for allowing vehicles, boats, or pedestrians to pass safely underneath. It is typically measured from the lowest point of the bridge structure to the ground or water level below. Adequate headroom is essential to prevent accidents and ensure safe navigation. Regulations often dictate minimum headroom requirements based on the type of traffic expected to pass underneath.