ABSTRACT
In California more than 24,000 bridges support one of the world’s most vibrant economies link the nearly 45,000 miles of pavement. In the current 21st century, this highway network massively built in 1950’s has failed to meet the fast-paced traffic demands due to the population increase. Recent years the severe congestion in statewide has adversely affected the economic growth. Local, regional and state transportation partners grapple constantly with congestion relief strategies. The vast majority of structures constructed in California are cast-in-place concrete that require substantial construction effort and extended construction completion time. This conventional project delivery processes in place for decades, which include planning, design and construction, are no longer acceptable norms in congestion relief projects. The state-of-the-art concept, accelerated project delivery (APD) that towards delivering infrastructure projects sooner offers a feasible tool for transportation planners, engineers and contractors to reduce overall impacts to the motoring public while completing improvements quickly. Typical project delivery schedules are controlled by construction of bridges, which require the most time to complete. ABC, as a main component of APD, has been widely recognized as utilizing prefabricated bridge components in bridge planning and design to substantially reduce on-site construction time. The careful planning, design, and implementation for an ABC project offers significant advantages over onsite cast-in-place construction in lowering costs, improving safety in job site, and mitigating environmental impact due to minimized construction time.
