The purpose of the Pedestrian Hazard, Awareness, and Safety Expansion Act of 2025, also known as the PHASE Act, is to improve safety for pedestrians and vulnerable road users, such as cyclists, by developing better traffic control measures and physical infrastructure. The Act aims to reduce traffic incidents that lead to injuries and fatalities among these groups. Key provisions of the Act include a requirement for the Director of the National Institute of Standards and Technology (NIST) to explore innovative technologies that enhance traffic control devices.