Bridge deterioration & ways to combat it?

bloody_darkangelgirl asked: I was wondering about what happens when bridges deteriorate. For example, a bridge will probably wear down in time due to weather and the constant stress of cars/trains driving over them. What do engineers do to combat these two factors & prolong the longevity of the bridge?

What will happen with those who finish engineering?

Lobosito Marino asked: would they build bridges?
some dont excel in engineering
ok its an open question but give me an idea

What kind of engineer builds bridges?

Amy asked: I’m doing a project in my design & tech class and I can’t find the answer anywhere. Thanks!

What do civil engineers do to make bridges earthquake proof?

czareanahisbored asked: And what are most bridges made of?