---
type: "Bill"
title: "A bill for an act relating to transportation and other infrastructure- related appropriations to the department of transportation, including allocation and use of moneys from the road use tax fund and the primary road fund. (Formerly SSB 1256.) Effective date: 07/01/2021."
description: "A bill for an act relating to transportation and other infrastructure- related appropriations to the department of transportation, including allocation and use of moneys from the road use tax fund and the primary road fund. (Formerly SSB 1256.) Effective date: 07/01/2021."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2021-2022"
identifier: "SF 592"
citation: "Iowa SF 592 (2021-2022)"
classification: ["bill"]
subjects: ["appropriations", "hazardous waste", "highways", "mississippi parkway planning commission", "motor vehicles", "primary road fund", "rest areas", "road use tax fund", "transportation", "transportation department", "unemployment compensation", "workers' compensation"]
status: "enacted"
primary_sponsors: []
version_count: 6
action_count: 18
vote_count: 2
first_action: "2021-04-06"
last_action: "2021-06-08"
source: "openstates"
source_identifier: "ocd-bill/f61da07f-199e-4d7a-9a40-27cbd4a6301a"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=SF 592&ga=89"
source_hash: "eb59438defe24d18444ff64dc84f6de5b9ef9ce17d8b42b171d3c0d5a2721b9b"
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-ia"]
---

# Iowa SF 592 (2021-2022) — A bill for an act relating to transportation and other infrastructure- related appropriations to the department of transportation, including allocation and use of moneys from the road use tax fund and the primary road fund. (Formerly SSB 1256.) Effective date: 07/01/2021.

## Version chain

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

1. **Introduced** (filed) — [source](https://www.legis.iowa.gov/docs/publications/LGI/89/attachments/SF592.html)
2. **Amendment S-3178** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/89/S3178.pdf)
3. **Reprinted** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGR/89/attachments/SF592.html)
4. **Reprinted Marked Up** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGRM/89/attachments/SF592.html)
5. **Signed Enrolled Bill (PDF)** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGE/89/Attachments/SF592_GovLetter.pdf)
6. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/89/attachments/SF592.html)

## Votes

- Shall the bill pass? — **48–0** (pass) · upper
- Shall the bill pass? — **90–0** (pass) · lower

## Timeline

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

- **2021-04-06** Introduced, placed on Appropriations calendar. `introduction`
- **2021-04-06** Committee report, approving bill.
- **2021-04-06** NOBA: Senate Full Approps
- **2021-04-28** Amendment S-3178 filed, adopted. `amendment-introduction, amendment-passage`
- **2021-04-28** Passed Senate, yeas 48, nays 0. `passage`
- **2021-04-28** Immediate message.
- **2021-04-28** Message from Senate.
- **2021-04-28** NOBA: Senate Floor
- **2021-05-03** Read first time, passed on file. `reading-1`
- **2021-05-06** Substituted for HF 863.
- **2021-05-06** Passed House, yeas 90, nays none. `passage`
- **2021-05-07** NOBA: Final
- **2021-05-13** Explanation of vote.
- **2021-05-18** Explanation of vote.
- **2021-05-06** Immediate message.
- **2021-05-07** Message from House.
- **2021-06-03** Reported correctly enrolled, signed by President and Speaker, and sent to Governor.
- **2021-06-08** Signed by Governor. `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/f61da07f-199e-4d7a-9a40-27cbd4a6301a`. Confidence: reported (aggregated from official Iowa legislature records).