The U.S. offers one of the most extensive road networks in the world. Residents enjoy swift and unobstructed travel by personal vehicle from journey's beginning to end. A major factor in facilitating such efficient commuting is our bridges. Consider how often the average commuter passes over a bridge in any given day. Such bridges may be large steel giants or they may be smaller spans used for going over a ditch or stream.
Much can go into building a modern bridge. An extensive amount of time and attention to detail is spent on design. Many resources, human and material, are used in the actual construction but, bridge work doesn't end there. Bridges require routine analyzing and maintenance to ensure safety. NBIS mandate bridge inspections every 2 yrs. The sheer number of bridges makes this formidable task.
Inspectors analyze a bridge's condition. They can spot signs of corrosion and unforeseen effects local environment is having upon the structure. An inspection often involves an array of inspection tools and including a bridge surveying vehicle.
Due to routine NBIS bridge inspection US bridges are being improved more effectively. That kind of mandated NBIS analysis means a safer drive for everyone.