This project will develop and validate a multi-criteria decision-making approach for enhancing the longevity of transportation infrastructure built on problematic test site conditions that includes poor subsoil conditions. In the United States, the annual cost of damage to constructed facilities built on problematic subsoil conditions was approximately $13 billion, and a significant portion of this amount can be attributed to damages sustained by pavement infrastructure. With continuing pressure on transportation agencies across the nation, several techniques including replacing the existing material and treating the problematic soils were implemented.
Transportation finance has become increasingly unreliable in recent years, due to the declining revenue available from the motor fuel tax, increasing auto efficiency, and political reluctance to raise taxes. In many states, this has led to deferred maintenance, poor road quality, and failure to satisfy demand for better infrastructure. Some states have relied on toll revenue and other user fees to overcome these revenue challenges.
Setting priority in highway improvement projects where safety consideration plays a differentiating role in the decision making process. As such, quantitative safety is now being recognized as an important element in the project selections process at the planning phase. Quantitative evaluation of safety performance of particular roadway facilities, for example, segments and intersections, is critical to understand where the safety concerns need to be addressed on a priority basis. Moreover, it is also important to implement appropriate safety improvements to prioritized set of locations where promise of safety benefits is potentially high.