Legislation: batch E — CA TN VA VT WA WI WV WY

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

legislation/us/states/ca/20152016/ab-51.md

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+---
+type: "Bill"
+title: "Vehicles: motorcycles: lane splitting."
+description: "Existing law requires, whenever a roadway has been divided into 2 or more clearly marked lanes for traffic in one direction, that a vehicle be driven as nearly as practical entirely within a single lane and not be moved from the lane until the movement can be made with reasonable safety."
+jurisdiction: "us/states/ca"
+legislature: "California Legislature"
+session: "20152016"
+identifier: "AB 51"
+citation: "California AB 51 (20152016)"
+classification: ["bill"]
+subjects: ["Vehicles: motorcycles: lane splitting."]
+status: "enacted"
+primary_sponsors: ["Quirk"]
+version_count: 7
+action_count: 23
+vote_count: 6
+first_action: "2014-12-01"
+last_action: "2016-08-19"
+source: "openstates"
+source_identifier: "ocd-bill/641198ee-ca5f-4099-bfbe-cc1860e6676f"
+source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160AB51"
+source_hash: "3bb375e8ba6a899763c0b9cc2479ec89580eb81b5154953787919e502574af01"
+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-ca"]
+---
+
+# California AB 51 (20152016) — Vehicles: motorcycles: lane splitting.
+
+Existing law requires, whenever a roadway has been divided into 2 or more clearly marked lanes for traffic in one direction, that a vehicle be driven as nearly as practical entirely within a single lane and not be moved from the lane until the movement can be made with reasonable safety.
+
+## Version chain
+
+The bill's text revisions, in order — the diff chain from filing to enrollment.
+
+1. **12/01/14 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160AB51&version=20150AB5199INT)
+2. **02/11/15 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160AB51&version=20150AB5198AMD)
+3. **05/22/15 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160AB51&version=20150AB5197AMD)
+4. **06/01/16 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160AB51&version=20150AB5196AMD)
+5. **08/19/16 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160AB51&version=20150AB5194CHP)
+6. **AB51** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160AB51)
+7. **08/05/16 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160AB51&version=20150AB5195ENR)
+
+## Votes
+
+- AB 51 QUIRK Concurrence in Senate Amendments — **74–0** (pass) · lower
+- 3rd Reading AB51 Quirk By Cannella — **38–0** (pass) · upper
+- Do pass. — **16–1** (pass) · lower
+- Do pass and be re-referred to the Committee on [Appropriations] — **13–1** (pass) · lower
+- Do pass, but first be re-referred to the Committee on [Appropriations] — **11–0** (pass) · upper
+- AB 51 QUIRK Assembly Third Reading — **58–14** (pass) · lower
+
+## Sponsors
+
+- Quirk — primary (person)
+- Chu — coauthor (person)
+- Lackey — author (person)
+
+## Timeline
+
+The legislative action history — every referral, reading, and vote.
+
+- **2014-12-01** Read first time. To print. `reading-1`
+- **2014-12-02** From printer. May be heard in committee January 1.
+- **2015-01-22** Referred to Com. on TRANS. `referral-committee`
+- **2015-02-11** From committee chair, with author's amendments: Amend, and re-refer to Com. on TRANS. Read second time and amended. `reading-2, amendment-introduction, amendment-passage, reading-1`
+- **2015-02-12** Re-referred to Com. on TRANS. `referral-committee`
+- **2015-04-07** From committee: Do pass and re-refer to Com. on APPR. (Ayes 13. Noes 1.) (April 6). Re-referred to Com. on APPR. `referral-committee, committee-passage-favorable, committee-passage`
+- **2015-04-29** From committee: Do pass. (Ayes 16. Noes 1.) (April 29). `committee-passage-favorable, committee-passage`
+- **2015-04-30** Read second time. Ordered to third reading. `reading-2, reading-1`
+- **2015-05-22** Read third time and amended. Ordered to third reading. (Page 1540.) `reading-3, amendment-passage, reading-1`
+- **2015-05-28** Read third time. Passed. Ordered to the Senate. (Ayes 58. Noes 14. Page 1619.) `reading-3, passage, reading-1`
+- **2015-05-28** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
+- **2015-06-18** Referred to Com. on T. & H. `referral-committee`
+- **2015-07-06** In committee: Set, first hearing. Hearing canceled at the request of author.
+- **2016-06-01** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on T. & H. `referral-committee, reading-2, amendment-introduction, amendment-passage, reading-1`
+- **2016-06-15** From committee: Do pass and re-refer to Com. on APPR. (Ayes 11. Noes 0.) (June 14). Re-referred to Com. on APPR. `referral-committee, committee-passage-favorable, committee-passage`
+- **2016-06-27** From committee: Be placed on second reading file pursuant to Senate Rule 28.8. `committee-passage`
+- **2016-06-28** Read second time. Ordered to third reading. `reading-2, reading-1`
+- **2016-08-01** Read third time. Passed. Ordered to the Assembly. (Ayes 38. Noes 0. Page 4729.). `reading-3, passage, reading-1`
+- **2016-08-02** In Assembly. Concurrence in Senate amendments pending. May be considered on or after August 4 pursuant to Assembly Rule 77.
+- **2016-08-04** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 74. Noes 0. Page 5700.). `committee-passage-favorable, amendment-passage`
+- **2016-08-10** Enrolled and presented to the Governor at 3 p.m.
+- **2016-08-19** Approved by the Governor. `executive-signature`
+- **2016-08-19** Chaptered by Secretary of State - Chapter 141, Statutes of 2016.
+
+## Source
+
+OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/641198ee-ca5f-4099-bfbe-cc1860e6676f`. Confidence: reported (aggregated from official California legislature records).
+