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To amend title 49, United States Code, with respect to the safety of driving automation systems, and for other purposes.
Summary
This bill establishes safety requirements for autonomous driving systems by requiring manufacturers to define and restrict their operation to designated "operational design domains." The operational design domain is defined as the specific operating conditions, including environmental and traffic characteristics, under which a driving automation system is designed to function safely. Manufacturers must submit their operational design domain definitions to the National Highway Traffic Safety Administration and make them publicly available on their websites. The bill requires driving automation systems to not operate outside their designated operational design domain and makes violations subject to civil penalties. The requirements take effect 180 days after enactment.
AI-generated plain-language summary of the bill text — neutral, and may be imperfect. See the full text below for the exact wording.
Sponsor (1)
1 cosponsor
Actions (2)
- Dec 17, 2025 Read twice and referred to the Committee on Commerce, Science, and Transportation. · senate
- Dec 17, 2025 Introduced in Senate
Similar bills (6)
Bills with similar text or summary — includes reintroductions across Congresses. Ranked by semantic similarity of the bill text (computed locally); a neutral discovery aid, not a claim the bills are duplicates.
Full text
IN THE SENATE OF THE UNITED STATES
December 17, 2025
Mr. Markey (for himself and Mr. Blumenthal) introduced the following bill; which was read twice and referred to the Committee on Commerce, Science, and Transportation
A BILL
To amend title 49, United States Code, with respect to the safety of driving automation systems, and for other purposes.
Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled,
SECTION 1. SHORT TITLE.
This Act may be cited as the “Stay in Your Lane Act”.
SEC. 2. OPERATIONAL DESIGN DOMAIN RESTRICTION FOR DRIVING SYSTEMS.
(a) Safe Domains for Driving Automation Systems.—
(1) In general.—Subchapter II of chapter 301 of title 49, United States Code, is amended by adding at the end the following: “Sec. 30130. Safe domains for driving automation systems
“(a) Definitions.—In this section:
“(1) Administrator.—The term ‘Administrator’ means the Administrator of the National Highway Traffic Safety Administration.
“(2) Driving automation system.—The term ‘driving automation system’ means the hardware and software that are collectively capable of simultaneously performing all of the lateral and longitudinal vehicle motor control subtasks of the dynamic driving task of a motor vehicle on a sustained basis.
“(3) Operational design domain.—The term ‘operational design domain’ means operating conditions, as defined by the manufacturer, under which a driving automation system, or feature thereof, is specifically designed to function safely, including—
“(A) environmental, geographical, and time-of-day restrictions; and
“(B) the requisite presence or absence of certain traffic, road users, or roadway characteristics.
“(4) Safely.—The term ‘safely’, with respect to motor vehicle safety, means presenting no more than an inconsequential risk.
“(b) Operational Design Domain.—Each manufacturer of a driving automation system shall ensure that the driving automation system does not operate outside of its operational design domain.
“(c) Declarations.—
“(1) In general.—Each manufacturer of a driving automation system shall—
“(A) define the operational design domain as the conditions under which the driving automation system, or feature thereof, is designed to function safely; and
“(B) submit to the Administrator a declaration of that definition.
“(2) Publication.—Each manufacturer of a driving automation system shall make the declaration submitted by the manufacturer under paragraph (1)(B) available on a publicly accessible website of the manufacturer, which shall be the exact declaration submitted to the Administrator under that paragraph.”.
(2) Clerical amendment.—The analysis for subchapter II of chapter 301 of title 49, United States Code, is amended by inserting after the item relating to section 30129 the following:
“Sec. 30130. Safe domains for driving automation systems.”.
(b) Civil Penalties.—Section 30165(a)(1) of title 49, United States Code, is amended, in the first sentence, by inserting “30130(b),” after “30127,”.
(c) Limited Definition of Motor Vehicle Safety Standard.—Section 30102(b) of title 49, United States Code, is amended—
(1) in paragraph (1)—
(A) by redesignating subparagraphs (C) through (H) as subparagraphs (D) through (I), respectively; and
(B) by inserting after subparagraph (B) the following:
“(C) ‘motor vehicle safety standard’ includes a requirement described in subsections (b) and (c)(1) of section 30130;”; and
(2) in paragraph (2), by striking “paragraph (1)(C), (D),
(F), or (G) of this subsection” and inserting “subparagraph
(D), (E), (G), or (H) of paragraph (1)”.
(d) Effective Date.—This Act and the amendments made by this Act shall take effect on the date that is 180 days after the date of enactment of this Act. <all>
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