S. 1798: Autonomous Vehicle Acceleration Act of 2025

Introduced May 15, 20250 cosponsors

Sponsor

Cynthia Lummis

Cynthia Lummis

Republican · WY

Senate bill fast-tracks self-driving rules

5 min readLast updated August 1, 2026

Why it matters

It would force the Transportation Department to rewrite or waive outdated car-safety rules within 1 year of enactment so Level 4 and Level 5 autonomous vehicles can move toward commercial-scale deployment faster.

S. 1798, the Autonomous Vehicle Acceleration Act of 2025, is built around a simple idea: many federal vehicle rules were written for cars with steering wheels, pedals, driver seats, and a person in control, while newer autonomous vehicles may not fit that model. The bill defines an autonomous vehicle as one with an automated driving system that can perform the entire dynamic driving task on a sustained basis without any expected involvement by a human driver, and it specifically covers Level 4 and Level 5 systems under SAE International Standard J3016 dated April 2021.

The bill gives the Secretary of Transportation, acting through the National Highway Traffic Safety Administration, 1 year after enactment to address all certification challenges identified in the March 2016 Volpe Center report on barriers in the Federal motor vehicle safety standards. That includes dealing with safety rules based on the presumption of a human driver and equipment specifications that do not account for autonomous designs, such as seating layouts, cabin configuration, window placement, and driver controls. To do that, the Secretary may develop, amend, interpret, or exempt FMVSS requirements and may create exemption processes consistent with 49 U.S.C. 30114(a).

It also requires a broader roadmap for commercial-scale deployment of Level 4 and Level 5 autonomous vehicles, also due not later than 1 year after enactment. That roadmap must support U.S. design, manufacturing, and deployment, promote U.S. leadership in global markets and supply chains, identify ways to lower practical, technological, and regulatory barriers, recommend a risk hierarchy and a standard of safety, and include a supplemental technology assessment covering post-2016 industry developments and emerging safety concerns.

Congress would get an early progress check and a later accounting. The Secretary must submit a preliminary update on the supplemental technology assessment within 180 days after enactment, then submit a report on the Volpe-related fixes within 180 days after the 1-year implementation deadline, or 545 days after enactment. The roadmap must also be sent to the relevant congressional committees and made public, which means industry, safety advocates, and state regulators would all be able to scrutinize how the federal government plans to handle self-driving vehicles next.

Bill Progress

IntroducedMay 15
Committee 
Pass Senate 
Pass House 
Signed 
Law 

Latest Action · May 15, 2025

Read twice and Referred to Commerce, Science, and Transportation. for review

S. 1798 Bill Summary

What S. 1798 actually does.

1

1-year deadline to fix AV rule barriers

The Secretary of Transportation, through NHTSA, must address all certification challenges identified in the March 2016 Volpe Center report not later than 1 year after enactment, focusing on Federal motor vehicle safety standards that assume a human driver.

2

Level 4 and Level 5 vehicles covered

The bill defines an autonomous vehicle as one capable of performing the entire dynamic driving task on a sustained basis without expected human involvement, and it explicitly includes Level 4 and Level 5 systems using SAE International Standard J3016 dated April 2021.

3

NHTSA can amend, interpret, or exempt FMVSS

To remove barriers created by older human-driver assumptions, the Secretary may develop, amend, interpret, or exempt FMVSS under 49 U.S.C. 30111(a), including rules affecting seating, cabin configuration, window placement, and driver controls.

4

Exemption pathway tied to 49 U.S.C. 30114(a)

The bill allows the Secretary to establish exemption processes for autonomous vehicles consistent with 49 U.S.C. 30114(a), creating a formal route for vehicles that do not match traditional safety-rule designs.

5

Roadmap due in 1 year, update in 180 days

The Secretary must produce a roadmap for commercial-scale deployment of Level 4 and Level 5 autonomous vehicles within 1 year after enactment, and must first send Congress a preliminary update on the supplemental technology assessment within 180 days.

6

Public report due 545 days after enactment

The Secretary must submit a report to the appropriate congressional committees within 180 days after the 1-year implementation deadline—545 days after enactment—detailing new or revised rules, guidance, or other steps taken to address the Volpe 2016 challenges.

Who benefits from S. 1798?

Autonomous vehicle manufacturers

Companies building Level 4 and Level 5 vehicles would get a federal push to remove certification barriers within 1 year, especially rules that assume steering wheels, pedals, fixed driver seating, or other human-driver controls.

U.S. auto and technology supply chains

The roadmap must support design, manufacturing, and deployment in the United States and promote U.S. leadership in global markets and supply chains, which could help domestic producers compete earlier.

NHTSA and the Transportation Department

The bill gives the Secretary explicit authority to develop, amend, interpret, or exempt FMVSS and to create exemption processes under 49 U.S.C. 30114(a), clarifying how the agency can respond to autonomous vehicle designs.

Investors and commercial fleet operators

A public roadmap due within 1 year and an interim update at 180 days would provide clearer federal signals on deployment, safety expectations, and regulatory timing for large-scale autonomous vehicle operations.

Who is affected by S. 1798?

Traditional automakers

Legacy manufacturers would face pressure to adapt product planning and compliance strategies as federal rules are updated for Level 4 and Level 5 vehicles rather than only human-operated vehicles.

Auto safety advocates

Safety groups would be affected because the bill directs the Secretary to recommend a risk hierarchy and a standard of safety, while also allowing exemptions from existing FMVSS that were written under 49 U.S.C. 30111(a).

State and local transportation regulators

Public release of the federal roadmap and congressional updates at 180 days and 1 year could shape how states align road-use, permitting, and enforcement policies with federal autonomous vehicle policy.

Consumers and road users

Drivers, passengers, cyclists, and pedestrians would be affected by how quickly the federal government clears regulatory barriers for vehicles that can perform the entire dynamic driving task without expected human involvement.

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Tracking floor activity — no debate on S. 1798 yet. Updates when a legislator speaks on the record.

S1798 Legislative Journey

1 actions

Committee Action

May 15, 2025

Read twice and referred to the Committee on Commerce, Science, and Transportation.

About the Sponsor

Cynthia Lummis

Cynthia Lummis

Republican, WY · 17 years in Congress

Committees: Environment and Public Works, Banking, Housing, and Urban Affairs, Commerce, Science, and Transportation

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Committee Sponsors

Commerce, Science, and Transportation Committee

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S. 1798 Quick Facts

Cosponsors
0
Committee
Commerce, Science, and Transportation
Chamber
Senate
Policy
Transportation and Public Works
Introduced
May 15, 2025

Read twice and Referred to Commerce, Science, and Transportation. for review

May 15, 2025

Constituent Resources

Get notified when this bill moves

S. 1798 Common Questions

How long would NHTSA have to rewrite self-driving car safety rules under S. 1798?

NHTSA would have 1 year after enactment to address all certification challenges identified in the 2016 Volpe report under the Autonomous Vehicle Acceleration Act of 2025 (Section 4).

What is the 545-day report in the Autonomous Vehicle Acceleration Act of 2025?

According to S. 1798 Section 4, within 180 days after the 1-year deadline—545 days after enactment—the Secretary must report to Congress on rules, guidance, and other steps taken to fix Volpe-identified barriers.

Does S. 1798 require a self-driving vehicle technology update within 180 days?

Yes. Under the Autonomous Vehicle Acceleration Act of 2025 (Section 5), the Secretary must send Congress a preliminary update on the supplemental technology assessment within 180 days of enactment.

Can Level 4 and Level 5 vehicles be exempted from existing federal car safety rules under S. 1798?

Yes. Under S. 1798 Section 4, the Secretary may create exemption processes for autonomous vehicles consistent with 49 U.S.C. 30114(a).

Does the Autonomous Vehicle Acceleration Act cover cars without steering wheels or driver controls?

Yes. Under the Autonomous Vehicle Acceleration Act of 2025 (Section 4), NHTSA may amend, interpret, or exempt rules that block autonomous designs involving seating, cabin configuration, window placement, and driver controls.

Which self-driving vehicles are covered by the Autonomous Vehicle Acceleration Act of 2025?

The bill covers autonomous vehicles that can perform the entire dynamic driving task without expected human involvement, specifically Level 4 and Level 5 systems under SAE J3016 April 2021 (Section 3).

Can the Transportation Secretary reinterpret federal motor vehicle safety standards for autonomous vehicles under S. 1798?

Yes. According to S. 1798 Section 4, the Secretary may develop, amend, interpret, or exempt FMVSS requirements and related guidance to remove barriers for Level 4 and Level 5 vehicles.

What must be included in the self-driving deployment roadmap under S. 1798?

Under S. 1798 Section 5, the roadmap must support U.S. design, manufacturing, and deployment, promote global leadership, lower barriers, recommend a risk hierarchy and safety standard, and assess new safety concerns.

Does S. 1798 make the autonomous vehicle roadmap public?

Yes. Under the Autonomous Vehicle Acceleration Act of 2025 (Section 5), the final roadmap must be sent to the appropriate congressional committees and made publicly available.

What outdated federal safety assumptions would S. 1798 force NHTSA to address for self-driving cars?

According to S. 1798 Section 4, NHTSA must address rules that presume a human driver and standards whose performance specs, test procedures, or equipment requirements do not fit autonomous vehicle designs.

Based on S. 1798 bill text

Full Bill Text

Full text available on Congress.gov
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