The purpose of this legislation, known as the "Securing Infrastructure from Adversaries Act of 2026," is to protect U.S. transportation infrastructure from potential threats posed by foreign entities. Specifically, it aims to prevent the Secretary of Transportation from engaging with companies that use or obtain certain light detection and ranging (LiDAR) technology from designated foreign countries. Key provisions of the law include a strict prohibition on the Secretary of Transportation from procuring or contracting with any entity that uses LiDAR technology from specified foreign sources.