When have three bridges opened to let another bridge pass underneath them? It happened in New Jersey Wednesday afternoon, when the first of three giant steel arch bridge sections fabricated in upstate ...

Cars rush past, buses rumble forward and sometimes even heavy trains thunder across steel tracks high above rivers or valleys. Yet beneath all that movement, so ...

Trestle bridges don’t have long spans, but rather a continuous series of short spans with frequent supports which are individually called trestles, but sometimes the whole bridge is just called a ...