January 10, 2013 1:00 pm
by Nathaniel Coley P.E., Engineer, Office of Transportation Performance Management Federal Highway Administration, Washington, DC.
ABC offers many advantages over conventional bridge construction. Those advantages include reduced traffic impacts, onsite construction time, environmental impacts, and life-cycle costs; and improved work-zone safety, site constructability, material quality, and product durability. Most bridge owners are pursuing ABC to reduce onsite construction time and traffic impacts relative to conventional bridge construction. Although the reason for using ABC is typically to reduce traffic impacts, bridge owners in general don’t currently include costs such as those related to how the construction is impacting motorists in their decision-making process on whether ABC is the best solution when considering bridge replacements. When mobility impacts are not quantified, direct cost comparisons between ABC and conventional construction are not apples-to-apples comparisons. The presentation today compares work-zone road user costs for ABC and conventional bridge construction, and provides a simplified description of how to calculate them. Resources for in-depth evaluations also was provided.