About the research
Accelerated bridge construction (ABC) is the solution of choice to upgrade substandard bridges, while maintaining traffic flow and optimizing safety through work zones. However, the perception of higher construction costs for ABC versus conventional construction continues in spite of numerous ABC projects having lower construction costs relative to conventional construction. This inaccurate perception and the fear of cost overruns are causing some bridge owners to be hesitant about using ABC technologies, especially those technologies related to bridge system moves that can provide the greatest benefit for safety and traffic flow impacts.
Whether to use ABC for a specific project needs to be decided at the project development stage. Research is needed to assist state DOTs in identifying successful delivery methods used for previously completed ABC projects to further encourage agencies to consider implementing accelerate construction practices for future project needs. This project focuses on case studies of delivery methods for ABC projects, as well as exploring potential advantageous alternatives when possible. Additionally, while the traditional contracting method for state DOTs is primarily unit price contracting, there are alternatives, including cost plus, lump sum, lump sum with guaranteed maximum price, and progressive lump sum with a guaranteed maximum price. To date there has been little investigation into the use of these alternatives on ABC projects.