Although large truck advanced safety technologies such as automatic emergency braking, lane departure warning, and video-based onboard monitoring are becoming more prevalent, adoption rates and use are lagging due to concerns about return on investment (ROI). To address this, researchers at the Virginia Tech Transportation Institute (VTTI) developed an Excel-based ROI calculator and accompanying user manual. This report describes an extension of that original project: a web-based version of that calculator available at https://www.vtti.vt.edu/roicalculator/. The report describes the rationale behind the calculator and an provides an overview of the resources available on the website.