This opportunity seeks to advance end-to-end Intersection Safety System (ISS) prototyping, building on prior USDOT research to address critical questions in real-time conflict prediction and mitigation at intersections. The goal is to demonstrate physical ISS capabilities and evaluate the cost-benefit of broader deployment. No specific timelines, budget amounts, or performance location are mentioned in the description. The effort is open to any eligible entity, regardless of prior participation in related challenges. This summary is intended to help prospective bidders gauge their interest in the project.