THE CLASS 1 RAILROADS of North America were pioneers of bridge technology decades before anyone conceived of an auto- mobile. Although some criticize the railroads for their simplicity and old-fashioned methods, some of the earliest, most recent and best inno- vations related to Accelerated Bridge Construc- tion (ABC) originated in railroad applications. Although the railroads tend to stick with their tried-and-true methods, they also rec

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