Bridge water flows into river

The first picture of the photos below has holes that can be seen on the road of the bridge. These holes are present to let water that settles on the bridge to run through the troughs which lead to drain pipes that are used to lead the water into the river. The bridge is old and not in the best of conditions and this is done to avoid more weight from being settled into the structure. The water does not settle and does not cripple the structure more than it already is. This design of installing holes to remove water formation is known as deformation seam and is mainly done to avoid thermal stains on the bridge. The bridge is made up of several segments and is slightly deformed because of the temperature differences and the vibrations from the vehicles that run on top of it.