---
type: "Bill"
title: "Traffic control; traffic regulation; maximum width of school buses; provide for, and exempt from seasonal road restrictions. Amends secs. 717 & 722 of 1949 PA 300 (MCL 257.717 & 257.722)."
description: "Traffic control; traffic regulation; maximum width of school buses; provide for, and exempt from seasonal road restrictions. Amends secs. 717 & 722 of 1949 PA 300 (MCL 257.717 & 257.722)."
jurisdiction: "us/states/mi"
legislature: "Michigan Legislature"
session: "2017-2018"
identifier: "SB 915"
citation: "Michigan SB 915 (2017-2018)"
classification: ["bill"]
subjects: ["Traffic control: traffic regulation", "Transportation: school vehicles", "Vehicles: buses"]
status: "enacted"
primary_sponsors: []
version_count: 4
action_count: 26
vote_count: 2
first_action: "2018-03-21T04:00:00+00:00"
last_action: "2018-09-05T04:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/aa1a0dd1-1f44-4f0a-ac93-55392cbcf97b"
source_url: "http://legislature.mi.gov/doc.aspx?2018-SB-0915"
source_hash: "74248622519c74a57afeaad42718ea39b9c66e33df525c3eca6ba8facbfb30e6"
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 915 (2017-2018) — Traffic control; traffic regulation; maximum width of school buses; provide for, and exempt from seasonal road restrictions. Amends secs. 717 & 722 of 1949 PA 300 (MCL 257.717 & 257.722).

## 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://www.legislature.mi.gov/documents/2017-2018/billengrossed/Senate/htm/2018-SEBH-0915.htm)
2. **As Passed by the Senate** (committee substitute) — [source](http://www.legislature.mi.gov/documents/2017-2018/billengrossed/Senate/htm/2018-SEBS-0915.htm)
3. **Public Act** (committee substitute) — [source](http://www.legislature.mi.gov/documents/2017-2018/publicact/htm/2018-PA-0273.htm)
4. **Senate Introduced Bill** (committee substitute) — [source](http://www.legislature.mi.gov/documents/2017-2018/billintroduced/Senate/htm/2018-SIB-0915.htm)

## Votes

- passed; given immediate effect Roll Call # 518 Yeas 109 Nays 0 — **109–0** (pass) · lower
- PASSED ROLL CALL # 298 YEAS 37 NAYS 0 EXCUSED 0 NOT VOTING 0 — **37–0** (pass) · upper

## Sponsors

- 38 — cosponsor (person)
- Tom Casperson — cosponsor (person)

## Timeline

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

- **2018-03-21T04:00:00+00:00** INTRODUCED BY SENATOR THOMAS CASPERSON `introduction`
- **2018-03-21T04:00:00+00:00** REFERRED TO COMMITTEE ON TRANSPORTATION `referral-committee`
- **2018-05-01T04:00:00+00:00** REPORTED FAVORABLY WITHOUT AMENDMENT `committee-passage`
- **2018-05-01T04:00:00+00:00** COMMITTEE RECOMMENDED IMMEDIATE EFFECT
- **2018-05-01T04:00:00+00:00** REFERRED TO COMMITTEE OF THE WHOLE `referral-committee`
- **2018-05-15T04:00:00+00:00** REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITHOUT AMENDMENT(S) `committee-passage`
- **2018-05-15T04:00:00+00:00** PLACED ON ORDER OF THIRD READING
- **2018-05-16T04:00:00+00:00** PASSED ROLL CALL # 298 YEAS 37 NAYS 0 EXCUSED 0 NOT VOTING 0 `passage`
- **2018-05-16T04:00:00+00:00** received on 05/16/2018 `introduction`
- **2018-05-16T04:00:00+00:00** read a first time `reading-1`
- **2018-05-16T04:00:00+00:00** referred to Committee on Transportation and Infrastructure `referral-committee`
- **2018-06-05T04:00:00+00:00** reported with recommendation without amendment `committee-passage`
- **2018-06-05T04:00:00+00:00** referred to second reading
- **2018-06-07T04:00:00+00:00** read a second time `reading-2`
- **2018-06-07T04:00:00+00:00** placed on third reading
- **2018-06-12T04:00:00+00:00** read a third time `reading-3`
- **2018-06-12T04:00:00+00:00** passed; given immediate effect Roll Call # 518 Yeas 109 Nays 0 `passage`
- **2018-06-12T04:00:00+00:00** inserted full title
- **2018-06-12T04:00:00+00:00** returned to Senate
- **2018-06-12T04:00:00+00:00** GIVEN IMMEDIATE EFFECT
- **2018-06-12T04:00:00+00:00** FULL TITLE AGREED TO
- **2018-06-12T04:00:00+00:00** ORDERED ENROLLED
- **2018-07-25T04:00:00+00:00** PRESENTED TO GOVERNOR 6/25/2018 @ 2:20 PM `executive-receipt`
- **2018-09-05T04:00:00+00:00** APPROVED BY GOVERNOR 6/27/2018 @ 9:12 PM `executive-signature`
- **2018-09-05T04:00:00+00:00** FILED WITH SECRETARY OF STATE 6/29/2018 @ 10:50 AM
- **2018-09-05T04:00:00+00:00** ASSIGNED PA 0273'18 WITH IMMEDIATE EFFECT

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/aa1a0dd1-1f44-4f0a-ac93-55392cbcf97b`. Confidence: reported (aggregated from official Michigan legislature records).