Associate Professor Purdue University Fort Wayne Fort Wayne, IN, United States
Abstract: Riverbank stabilization by busy roads plays a critical role in ensuring safe and efficient transportation infrastructure. Unchecked erosion caused by rivers can lead to several detrimental consequences. Firstly, erosion undermines the road foundation, causing cracks, potholes, and ultimately, road closures. This disrupts traffic flow, leading to increased travel times and congestion, impacting economic productivity and emergency response times. Secondly, erosion can damage roadside infrastructure like utilities and signage, incurring additional repair costs. Finally, collapsing riverbanks can pose safety hazards to motorists and pedestrians. Despite the long-term protection riverbank stabilization offers to road infrastructure, the initial cost can be significant. The economic benefits depend on several factors. Roads with high traffic volume see a greater return on investment due to minimized delays caused by erosion repairs. Project complexity, measured by stabilization time, also plays a role. Additionally, flood risk is a crucial consideration. To optimize resource allocation, a sensitivity analysis is necessary to understand how these factors impact the potential benefits. Notably, this study aims to fill the gap in existing research by exploring strategies to maximize benefits through reduced construction costs, minimized project delays, and lowered emissions.
This study presents a framework for economic analysis to assess the viability of riverside stabilization projects, following guidelines set by the U.S. Department of Transportation (USDOT). This framework considers both the costs and benefits (reduced travel time, vehicle operating costs, pavement repairs, and emissions) of such projects. By comparing costs and benefits, the framework can inform decisions about investing in riverside stabilization along busy roadways. A case study applying this framework to an urban riverbank stabilization project showed a significant benefit-cost ratio (up to 18.91), highlighting the economic advantages of proactive measures in protecting critical transportation infrastructure.
Learning Objectives:
Attendees can expect to learn the following from this session:
Upon completion, participant will be able to develop and implement an economic framework to assess the viability of riverside stabilization projects, aligning with USDOT guidelines.
Upon completion, participant will be able to quantify the costs and benefits of riverside stabilization projects, considering factors like reduced travel time, vehicle operating costs, pavement repairs, and emissions.
Upon completion, participant will be able to evaluate the economic feasibility of riverside stabilization projects through a case study analysis, considering factors like traffic volume, project complexity, and flood risk.
