---
type: "Bill"
title: "Revise right-of-way laws for roundabouts"
description: "Revise right-of-way laws for roundabouts"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "SB 433"
citation: "Montana SB 433 (2025)"
classification: ["bill"]
subjects: ["Highways and Roads"]
status: "enacted"
primary_sponsors: ["Theresa Manzella"]
version_count: 38
action_count: 42
vote_count: 7
first_action: "2024-11-04T15:07:46+00:00"
last_action: "2025-05-08T21:28:51+00:00"
source: "openstates"
source_identifier: "ocd-bill/d147d6e4-d818-41fc-bb4b-dfdbc348cde8"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC0783?open_tab=sum"
source_hash: "c4101e81f7bae208f6bca98b759103a6bf5c9f9f6e9131b63204004b7f75bff4"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-mt"]
---

# Montana SB 433 (2025) — Revise right-of-way laws for roundabouts

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **LC0783.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283624)
2. **SB0433.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=292630)
3. **SB0433.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=292631)
4. **SB0433_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=287894)
5. **SB0433_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293027)
6. **SB0433_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293028)
7. **SB0433_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293029)
8. **SB0433_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293030)
9. **SB0433_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=286486)
10. **SB0433_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293032)
11. **SB0433_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300640)
12. **SB0433_2(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309253)
13. **SB0433_2(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309259)
14. **SB0433_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293033)
15. **SB0433_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293034)
16. **SB0433_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293047)
17. **SB0433_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293049)
18. **SB0433_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293050)
19. **SB0433_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293051)
20. **SB0433_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293519)
21. **SB0433_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293691)
22. **SB0433_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293031)
23. **SB0433_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309262)
24. **SB0433_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321905)
25. **SB0433_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321906)
26. **SB0433_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321907)
27. **SB0433_X(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324768)
28. **SB0433_X(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325987)
29. **SB0433_X(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327426)
30. **SB0433_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309264)
31. **SB0433_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309402)
32. **SB0433_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309403)
33. **SB0433_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309548)
34. **SB0433_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309549)
35. **SB0433_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310977)
36. **SB0433_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316914)
37. **SB0433_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320489)
38. **SB0433_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309260)

## Votes

- do_pass — **7–1** (pass) · upper
- Do Concur — **98–1** (pass) · lower
- Do Pass — **48–1** (pass) · upper
- AMD-SB0433.001.001 Manzella D/PASS — **50–0** (pass) · upper
- be_concurred_in — **13–1** (pass) · lower
- Do Pass As Amended — **48–2** (pass) · upper
- Do Concur — **100–0** (pass) · lower

## Sponsors

- Theresa Manzella — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2024-11-04T15:07:46+00:00** (LC) Drafter Assigned
- **2024-11-04T15:07:46+00:00** (LC) Draft On Hold
- **2025-02-14T17:38:02+00:00** (LC) Draft Taken Off Hold
- **2025-02-14T23:48:48+00:00** (LC) Draft in Legal Review
- **2025-02-15T17:13:50+00:00** (LC) Draft in Edit
- **2025-02-18T15:47:18+00:00** (LC) Draft in Input/Proofing
- **2025-02-20T05:18:26+00:00** (LC) Draft in Final Drafter Review
- **2025-02-20T18:35:26+00:00** (LC) Draft in Assembly
- **2025-02-20T22:47:55+00:00** (LC) Draft Ready for Delivery
- **2025-02-21T22:37:37+00:00** (LC) Draft Delivered to Requester
- **2025-02-24T17:42:32+00:00** (S) Introduced
- **2025-02-24T20:16:12+00:00** (S) First Reading `reading-1`
- **2025-02-25T01:27:57+00:00** (S) Referred to Committee - (S) Highways and Transportation `referral-committee`
- **2025-02-25T19:13:00+00:00** (S) Hearing - (S) Highways and Transportation
- **2025-02-26T00:45:54+00:00** (S) Fiscal Note Requested
- **2025-03-01T01:59:33+00:00** (S) Committee Executive Action--Bill Passed - (S) Highways and Transportation `committee-passage`
- **2025-03-01T19:31:00+00:00** (S) Committee Report--Bill Passed - (S) Highways and Transportation `committee-passage`
- **2025-03-03T15:24:02+00:00** (S) Fiscal Note Received `receipt`
- **2025-03-03T15:24:08+00:00** (S) Fiscal Note Unsigned
- **2025-03-03T19:25:04+00:00** (S) Fiscal Note Printed
- **2025-03-05T20:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-03-05T23:43:00+00:00** (S) 2nd Reading Motion to Amend Carried `reading-2`
- **2025-03-05T23:46:00+00:00** (S) 2nd Reading Passed as Amended `reading-2, reading-2`
- **2025-03-07T00:30:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-03-07T01:46:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2025-03-07T16:18:30+00:00** (S) Transmitted to House
- **2025-03-17T15:21:20+00:00** (H) Referred to Committee - (H) Transportation `referral-committee`
- **2025-03-17T19:15:00+00:00** (H) First Reading `reading-1`
- **2025-03-18T17:25:20+00:00** (H) Hearing - (H) Transportation
- **2025-03-28T23:28:50+00:00** (H) Committee Executive Action--Bill Concurred - (H) Transportation
- **2025-03-29T15:44:00+00:00** (H) Committee Report--Bill Concurred - (H) Transportation
- **2025-04-10T14:30:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-04-10T21:40:00+00:00** (H) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-11T21:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-11T23:44:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2025-04-11T23:44:46+00:00** (S) Sent to Enrolling
- **2025-04-13T13:59:45+00:00** (S) Returned from Enrolling
- **2025-04-21T22:00:17+00:00** (S) Signed by President `passage`
- **2025-04-25T20:40:10+00:00** (H) Signed by Speaker `passage`
- **2025-04-25T21:18:10+00:00** (S) Transmitted to Governor `executive-receipt`
- **2025-05-05T19:05:00+00:00** (S) Signed by Governor `executive-signature`
- **2025-05-08T21:28:51+00:00** Chapter Number Assigned `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/d147d6e4-d818-41fc-bb4b-dfdbc348cde8`. Confidence: reported (aggregated from official Montana legislature records).