1. Short title This Act may be cited as the Stop Underrides Act of 2017 . 2. Findings and purposes (a) Findings Congress finds the following: (1) Underride crashes involving passenger motor vehicles striking and traveling underneath a truck or trailer are a significant public health and safety threat. (2) The National Highway Traffic Safety Administration has reported that hundreds of preventable fatalities and life-threatening injuries have occurred as a result of underride crashes. (3) The National Transportation Safety Board has recommended the installation of rear, side, and front underride guards on tractor-trailers to improve passenger motor vehicle safety. (4) This bill is introduced in the memory of the thousands of victims of underride crashes, including— (A) Roya Christine Sadigh, AnnaLeah Karth, Mary Lydia Karth, Roderick Cota, Moonjohn Kim, Corey Moore, Gregg Williams, Guy Champ Crawford, Carl Hall, Michael Higginbotham, Sandra Maddamma, David Mathis, Mary Katherine Mathis, James Mooney, Christopher Weigl, Bill Zink, David Magnan, Jasen Swift, Samuel Sierra, Brittany McHargue, Christopher Samuel Padilla, and Edward Hall; (B) those whose catastrophic injuries dramatically changed their lives, including Julie Magnan, Nancy Meuleners, Joshua Rojas, Maiv Yang, and Anita Plantage Bomgaars; and (C) those whose precious lives were cut far too short as a result of preventable underride crashes. (b) Purpose The purpose of this Act is— (1) to reduce the number of preventable deaths and injuries caused by underride crashes; and (2) to improve motor carrier and passenger motor vehicle safety. 3. Definitions Section 30102(a) of title 49 is amended— (1) by redesignating paragraphs (5), (6), (7), (8), (9), (10), (11), (12), and (13) as paragraphs (6), (7), (8), (9), (10), (11), (14), (19), and (21), respectively