The "Stop Underrides Act 2.0" aims to enhance road safety by reducing deaths and injuries from underride crashes, which occur when smaller vehicles slide underneath larger trucks during collisions. The legislation seeks to improve protective systems on these larger vehicles, making crashes more survivable and safeguarding vulnerable road users, including pedestrians, cyclists, and motorcyclists. Key provisions of the act include the establishment of new safety standards for underride guards on trailers, semitrailers, and single-unit trucks.