Construction Inhibitors of Alternative Intersections and Interchanges

The use of alternative intersections and interchanges (AII) is crucial for transportation infrastructure because AII enhances traffic flow, increases capacity and safety, and accounts for future traffic demands. One challenging problem is that AII designs are negatively perceived in the construction industry since they are perceived to result in additional construction time and cost compared to projects with conventional designs. To assess this concern, the identification of construction inhibitors affecting AII projects was investigated using claims and supplemental agreement data using AIIs and conventional design projects. Findings indicated inhibitors that most affected project performance and top five inhibitors were utilities, additional work, work delays, safety for workers, and weather impacts. By understanding the potentially negative impact of these inhibitors, the constructability of AII projects can be enhanced, and transportation agencies can opt for more sustainable solutions.