---
type: "Bill"
title: "Transportation: other; definition of automated driving systems and automated vehicle roadway; modify and expand. Amends secs. 2b, 642 & 665 of 1949 PA 300 (MCL 257.2b et seq.) & adds secs. 665c, 665d, 665e & 666a."
description: "Transportation: other; definition of automated driving systems and automated vehicle roadway; modify and expand. Amends secs. 2b, 642 & 665 of 1949 PA 300 (MCL 257.2b et seq.) & adds secs. 665c, 665d, 665e & 666a."
jurisdiction: "us/states/mi"
legislature: "Michigan Legislature"
session: "2021-2022"
identifier: "SB 706"
citation: "Michigan SB 706 (2021-2022)"
classification: ["bill"]
subjects: ["Safety: other", "State agencies (existing): transportation", "Transportation: other", "Vehicles: equipment"]
status: "enacted"
primary_sponsors: ["Kenneth Horn"]
version_count: 5
action_count: 32
vote_count: 3
first_action: "2021-10-27T04:00:00+00:00"
last_action: "2022-08-17T04:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/bc0642fd-7150-4d7d-89e2-af61846871c4"
source_url: "http://legislature.mi.gov/doc.aspx?2021-SB-0706"
source_hash: "71338a575c906fc3ac6abf45b7da9e15054e4f93eabe310970b560ceea07af14"
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-mi"]
---

# Michigan SB 706 (2021-2022) — Transportation: other; definition of automated driving systems and automated vehicle roadway; modify and expand. Amends secs. 2b, 642 & 665 of 1949 PA 300 (MCL 257.2b et seq.) & adds secs. 665c, 665d, 665e & 666a.

## Version chain

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

1. **As Passed by the House** (committee substitute) — [source](http://legislature.mi.gov/documents/2021-2022/billengrossed/Senate/htm/2021-SEBH-0706.htm)
2. **As Passed by the Senate** (committee substitute) — [source](http://legislature.mi.gov/documents/2021-2022/billengrossed/Senate/htm/2021-SEBS-0706.htm)
3. **Public Act** (committee substitute) — [source](http://legislature.mi.gov/documents/2021-2022/publicact/htm/2022-PA-0179.htm)
4. **Senate Concurred Bill** (committee substitute) — [source](http://legislature.mi.gov/documents/2021-2022/billconcurred/Senate/htm/2021-SCB-0706.htm)
5. **Senate Introduced Bill** (committee substitute) — [source](http://legislature.mi.gov/documents/2021-2022/billintroduced/Senate/htm/2021-SIB-0706.htm)

## Votes

- ROLL CALL: ROLL CALL # 398 YEAS 35 NAYS 2 EXCUSED 1 NOT VOTING 0 — **35–2** (pass) · upper
- passed; given immediate effect Roll Call # 335 Yeas 59 Nays 46 Excused 0 Not Voting 5 — **59–46** (pass) · lower
- PASSED ROLL CALL # 14 YEAS 33 NAYS 4 EXCUSED 1 NOT VOTING 0 — **33–4** (pass) · upper

## Sponsors

- Kenneth Horn — primary (person)
- Curtis VanderWall — cosponsor (person)
- Dale Zorn — cosponsor (person)
- Dan Lauwers — cosponsor (person)
- Erika Geiss — cosponsor (person)
- Jim Ananich — cosponsor (person)
- Kimberly LaSata — cosponsor (person)
- Marshall Bullock — cosponsor (person)
- Michael MacDonald — cosponsor (person)
- Stephanie Chang — cosponsor (person)
- Wayne Schmidt — cosponsor (person)

## Timeline

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

- **2021-10-27T04:00:00+00:00** INTRODUCED BY SENATOR KEN HORN `introduction`
- **2021-10-27T04:00:00+00:00** REFERRED TO COMMITTEE ON ECONOMIC AND SMALL BUSINESS DEVELOPMENT `referral-committee`
- **2021-12-14T05:00:00+00:00** REPORTED FAVORABLY WITH SUBSTITUTE (S-1) `committee-passage`
- **2021-12-14T05:00:00+00:00** COMMITTEE RECOMMENDED IMMEDIATE EFFECT
- **2021-12-14T05:00:00+00:00** REFERRED TO COMMITTEE OF THE WHOLE WITH SUBSTITUTE (S-1) `referral-committee`
- **2022-01-26T05:00:00+00:00** REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITH SUBSTITUTE (S-1) `committee-passage`
- **2022-01-26T05:00:00+00:00** SUBSTITUTE (S-1) CONCURRED IN
- **2022-01-26T05:00:00+00:00** PLACED ON ORDER OF THIRD READING WITH SUBSTITUTE (S-1)
- **2022-01-27T05:00:00+00:00** SUBSTITUTE (S-2) ADOPTED
- **2022-01-27T05:00:00+00:00** PASSED ROLL CALL # 14 YEAS 33 NAYS 4 EXCUSED 1 NOT VOTING 0 `passage`
- **2022-01-27T05:00:00+00:00** received on 01/27/2022 `introduction`
- **2022-01-27T05:00:00+00:00** read a first time `reading-1`
- **2022-01-27T05:00:00+00:00** referred to Committee on Transportation `referral-committee`
- **2022-05-24T04:00:00+00:00** reported with recommendation with substitute (H-2) `committee-passage`
- **2022-05-24T04:00:00+00:00** referred to second reading
- **2022-06-21T04:00:00+00:00** read a second time `reading-2`
- **2022-06-21T04:00:00+00:00** substitute (H-2) adopted
- **2022-06-21T04:00:00+00:00** substitute (H-3) adopted
- **2022-06-21T04:00:00+00:00** placed on third reading
- **2022-06-30T04:00:00+00:00** read a third time `reading-3`
- **2022-06-30T04:00:00+00:00** passed; given immediate effect Roll Call # 335 Yeas 59 Nays 46 Excused 0 Not Voting 5 `passage`
- **2022-06-30T04:00:00+00:00** title amended
- **2022-06-30T04:00:00+00:00** returned to Senate
- **2022-06-30T04:00:00+00:00** HOUSE SUBSTITUTE (H-3) CONCURRED IN
- **2022-06-30T04:00:00+00:00** ROLL CALL: ROLL CALL # 398 YEAS 35 NAYS 2 EXCUSED 1 NOT VOTING 0
- **2022-06-30T04:00:00+00:00** GIVEN IMMEDIATE EFFECT
- **2022-06-30T04:00:00+00:00** TITLE AMENDMENT AGREED TO
- **2022-06-30T04:00:00+00:00** ORDERED ENROLLED
- **2022-07-20T04:00:00+00:00** PRESENTED TO GOVERNOR 07/11/2022 01:38 PM `executive-receipt`
- **2022-08-17T04:00:00+00:00** APPROVED BY GOVERNOR 07/25/2022 09:18 AM `executive-signature`
- **2022-08-17T04:00:00+00:00** FILED WITH SECRETARY OF STATE 07/25/2022 10:32 AM
- **2022-08-17T04:00:00+00:00** ASSIGNED PA 0179'22 WITH IMMEDIATE EFFECT

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/bc0642fd-7150-4d7d-89e2-af61846871c4`. Confidence: reported (aggregated from official Michigan legislature records).