---
type: "Bill"
title: "A bill for an act relating to motor vehicles approaching certain stationary motor vehicles, and providing penalties. (Formerly HSB 509.) Effective 7-1-18."
description: "A bill for an act relating to motor vehicles approaching certain stationary motor vehicles, and providing penalties. (Formerly HSB 509.) Effective 7-1-18."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2017-2018"
identifier: "HF 2304"
citation: "Iowa HF 2304 (2017-2018)"
classification: ["bill"]
subjects: ["construction work", "driving", "highways", "lights", "motor vehicles", "stopped vehicles", "transportation", "vehicles"]
status: "enacted"
primary_sponsors: []
version_count: 2
action_count: 15
vote_count: 2
first_action: "2018-02-09"
last_action: "2018-04-04"
source: "openstates"
source_identifier: "ocd-bill/d09799f2-d26d-4288-86bf-cb6d79d2238c"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=HF 2304&ga=87"
source_hash: "56aca81224714253d4173017096f8e8944aa90a3f967ef767d4d9e32be4276ac"
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 HF 2304 (2017-2018) — A bill for an act relating to motor vehicles approaching certain stationary motor vehicles, and providing penalties. (Formerly HSB 509.) Effective 7-1-18.

## 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/87/attachments/HF2304.html)
2. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/87/attachments/HF2304.html)

## Votes

- Shall the bill pass? — **46–0** (pass) · upper
- Shall the bill pass? — **96–0** (pass) · lower

## Timeline

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

- **2018-02-09** Introduced, placed on calendar. `introduction`
- **2018-03-05** Passed House, ayes 96 nays none. `passage`
- **2018-03-05** Immediate message.
- **2018-03-05** Message from House.
- **2018-03-05** Read first time, passed on file. `reading-1`
- **2018-03-06** Referred to Transportation. `referral-committee`
- **2018-03-08** Subcommittee: Smith, Danielson, and Kraayenbrink.
- **2018-03-13** Committee report, recommending passage. `committee-passage`
- **2018-03-22** Placed on calendar under unfinished business.
- **2018-03-28** Passed Senate, ayes 46, nays 0. `passage`
- **2018-03-28** Immediate message.
- **2018-03-29** Message from Senate.
- **2018-04-03** Reported correctly enrolled, signed by Speaker and President.
- **2018-04-03** Sent to Governor. `executive-receipt`
- **2018-04-04** 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/d09799f2-d26d-4288-86bf-cb6d79d2238c`. Confidence: reported (aggregated from official Iowa legislature records).