SB 67 Montana Senate · 2025 Regular Session

Provide for the use of autonomous vehicles

Senate Bill 67, titled the "Montana Automated Driving Systems Act," allows vehicles equipped with automated driving systems to be used on the public highways of Montana. The bill defines various levels of these systems, from Level 1 (driver assistance) to Level 5 (full automation). It permits Level 1, 2, and 3 automated driving systems without additional restrictions. However, Level 4 and 5 systems are allowed subject to limitations established by the Department of Transportation through rulemaking, which is also granted by the bill. This legislation creates a framework for the use and regulation of autonomous vehicles in the state.
Bill status signed all 5 stages cleared
Introduction
Dec 2024
Committee Review
Apr 2025
Senate Passage
Apr 2025
House Passage
Apr 2025
Signed into Law
May 2025
Introduced Dec 27, 2024 Signed May 8, 2025
Maddy AI version diff · 7 comparisons

What changed between versions

SB0067_X(4).pdf SB0067_X(5).pdf · 5 edits
MODERATE
The bill was updated to streamline its title and reorganize the definition of automated driving levels. Most significantly, the rules for Level 4 and Level 5 vehicles were expanded to allow them on public highways without requiring a human driver to be ready to intervene immediately, shifting the focus to the vehicle's ability to handle system failures or exit the operational domain on its own.
Scope change
The bill now explicitly permits Level 4 and Level 5 automated vehicles on state highways, whereas previous versions required a human driver to be ready to take control upon a system request or failure.
DEFINITION

The definition of 'Level 3 automated driving system' was changed to require a human driver to be ready to intervene only after a specific request or system failure, rather than being required to perform the task on a sustained basis.

The definition of 'Level 4 automated driving system' was updated to remove the requirement for a human driver to respond to intervention requests, allowing the vehicle to handle all maneuvers necessary to achieve a minimal risk condition independently.

The definition of 'Level 5 automated driving system' was similarly updated to remove the requirement for a human driver to respond to intervention requests, enabling full autonomy under all conditions.

A new subsection was added to Section 4 stating that local governments cannot regulate traffic or improve transportation networks in a way that discriminates against vehicles with automated driving systems.

ELIGIBILITY

The section allowing the use of automated driving systems was revised to clarify that Level 4 and Level 5 vehicles may be used on public highways subject to department rulemaking, reflecting the new definitions of higher autonomy.

Floor votes · Senate Mar 5, 2025 · House Apr 11, 2025

How they voted

409
Passed · 1 other
Total votes 50
Mar 5, 2025
D Democratic18
16 Yea 2 Nay
88% Yea
R Republican32
24 Yea 7 Nay 1
75% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
51
Key actions
12
Committee
10
Amendments
1
May 5, 2025
Signed into law
(S) Signed by Governor
upper
Apr 25, 2025
Lower · Passed
(H) Signed by Speaker
lower
Apr 21, 2025
Upper · Passed
(S) Signed by President
upper
Apr 11, 2025
House · Passed
House Vote: pass (93-6-1)
house
Apr 10, 2025
Lower · Passed
(H) Committee Report - (H) Appropriations
lower
Apr 10, 2025
Lower · Passed
(H) Committee Executive Action - (H) Appropriations
lower
Apr 9, 2025
Committee
(H) Rereferred to Committee - (H) Appropriations
lower
Apr 1, 2025
Lower · Passed
(H) Committee Report - (H) Transportation
lower
Mar 31, 2025
Lower · Passed
(H) Committee Executive Action - (H) Transportation
lower
Mar 5, 2025
Senate · Passed
Senate Vote: pass (40-9-1)
senate
Mar 5, 2025
Committee
(H) Referred to Committee - (H) Transportation
lower
Feb 28, 2025
Upper · Passed
(S) Committee Report - (S) Energy, Technology & Federal Relations
upper
Feb 28, 2025
Upper · Passed
(S) Committee Executive Action - (S) Energy, Technology & Federal Relations
upper
Jan 23, 2025
Amended
(S) Tabled in Committee - (S) Energy, Technology & Federal Relations
upper
Jan 21, 2025
Upper · Passed
(S) Committee Executive Action - (S) Energy, Technology & Federal Relations
upper
Jan 14, 2025
Committee
(S) Referred to Committee - (S) Energy, Technology & Federal Relations
upper
Dec 27, 2024
Introduced
(S) Introduced
upper
1 primary · 0 co-sponsors

Sponsors

Role
Legislator
Party
State
District
P
Photo of Denley Loge
Denley Loge
RRepublican
MT
45