Bridges are a beautiful example of structural engineering and essential pieces of infrastructure. the Rapid Bridge Replacement System installs on top of the rails, rather than underneath, eliminating the need for below-rail modifications to adjacent sections. 
“Depending on the number of spans, railroads can safely and efficiently replace a complete bridge in days rather than months,” explained Bogdan Gaita, VP of Engineered Rigging
It can be assembled in three to four shifts, while the rigging components can be shipped on five standard size flatbed trucks requiring no special permits
I really like this post sarnaly! keep it up!