Investigating the Impact of Alternative Technical Concepts for Project Delivery of Accelerated Bridge Construction

Accelerated bridge construction (ABC) is an off-site construction approach that reduces construction time, traffic disruption, and safety hazards on construction sites. However, the acceptance of this off-site methodology is challenged by many obstacles, including high initial cost, inexperienced contractors and manufacturers, and a lack of early contractor involvement. An alternative technical concept (ATC) is a proposal made during the bidding or procurement process with an equal or better alternative in the baseline project design. It allows for early contractor involvement and risk mitigation during the bidding stage. This study aims to highlight and provide a metric that supports ABC stakeholders in recognizing the merits of using ATCs during the bidding stage on ABC projects. To achieve this goal, this study utilizes a qualitative approach that includes (1) case studies that successfully integrated ATCs in different delivery methods of an ABC project; and (2) analysis to identify strengths, weaknesses, opportunities, and threats (SWOT) of requesting ATCs in ABC projects in comparison to the ABC projects that did not request ATCs. The qualitative results indicate that ATCs adoption in ABC projects ensures a reduction in cost, time, risks, and legal and contractual issues. Additionally, the SWOT analysis results facilitates ABC stakeholders with comprehensive knowledge about how they can take advantage of ATCs' strengths, address weaknesses, deter threats, and capitalize on opportunities created by the adoption of ATCs within future ABC projects. The study's findings demonstrate an innovative approach to addressing contractual and constructability challenges in ABC projects through ATCs, thereby promoting innovation, and maximizing off-site construction benefits.