The civic record
Read. Follow. Verify.Iowa allows slow-moving farm equipment on designated interstate highway segments until an alternative route opens
Last action · May 27, 2025: Signed by Governor . H.J. 1229 .
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What This Bill Does
Iowa law permits implements of husbandry to continue operating on sections of U.S. Highway 65 and State Highway 5 even after designation as part of the interstate road system, provided they used the route prior to the change. The exception lasts until a suitable alternative bypass route is developed and opened for traffic. Additionally, the legislation restricts the state Department of Transportation and State Transportation Commission from pursuing certain interstate road designations unless a federal weight and size exemption is granted.
Farmers and agricultural operators retain access to specific highway segments for slow-moving equipment during interstate transitions, while state and local agencies must collaborate on studying and building an alternative bypass route.
- State File 643 addresses highway designations and vehicle operation rules in Iowa, succeeding previous drafts SF 568 and SSB 1187. context
Who It Affects
Groups the bill's text affects, as described in the record. Being affected is not a position for or against it.
Agricultural operators
Farmers and equipment owners are allowed to continue operating slow-moving machinery on designated highway segments until an alternative route is completed.
Department of Transportation
The department must restrict interstate designation pursuits without federal exemptions, collaborate on an alternative highway study, and notify the code editor when an alternative route opens.
Key Facts
- Vehicles or equipment incapable of maintaining 40 miles per hour are generally prohibited from the interstate road system, but the bill creates a conditional exception for implements of husbandry.
- The exception applies to sections of U.S. Highway 65 and State Highway 5 between U.S. Highway 6 and U.S. Highway 69, or farther west if authorized.
- The exception remains in effect until an alternative route for implements of husbandry is developed, deemed suitable by the Department of Transportation in consultation with the Department of Agriculture and Land Stewardship, and opened for traffic.
- The Department of Transportation and State Transportation Commission are prohibited from pursuing an interstate road designation for the highway segment between Interstate 35 and Interstate 80 unless the U.S. government provides federal weight and size exemptions.
Show all 5 facts
- The Department of Transportation must collaborate with the Des Moines area metropolitan planning organization on an alternative highway study for farm equipment routes.
Frequently Asked Questions
Can slow-moving farm machinery use the new interstate segments?
What triggers the repeal of the agricultural equipment exemption?
What agencies are involved in studying alternative routes?
What else do you want to know?
News Coverage
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Votes, people, money & the original sourceWhere This Stands
Current status: Signed into law.
Procedural history
38 actions- May 27, 2025HouseEnrolledSigned by Governor . H.J. 1229 .
- May 19, 2025HouseReported correctly enrolled, signed by Speaker and President, and sent to Governor. H.J. 1224 .
- May 12, 2025HouseMessage from Senate. H.J. 1141 .
- May 12, 2025SenateImmediate message. S.J. 963 .
- May 12, 2025SenateFloorPassed Senate , yeas 50, nays 0. S.J. 961 .
- May 12, 2025SenateSubstituted for SF 643 . S.J. 961 .
Show 32 earlier actions
- May 12, 2025SenateWithdrawn. S.J. 962 .
- May 12, 2025SenateHF 1025 substituted. S.J. 961 .
- May 2, 2025SenateNOBA: Senate Full Approps
- Apr 30, 2025SenateAttached to SF 643 . S.J. 934 .
- Apr 30, 2025SenateCommittee report approving bill, renumbered as SF 643 . S.J. 933 .
- Apr 30, 2025SenateAttached to HF 1025 . S.J. 934 .
- Apr 30, 2025SenateCommittee report, approving bill. S.J. 933 .
- Apr 30, 2025SenateIntroducedIntroduced, placed on Appropriations calendar. S.J. 932 .
- Apr 28, 2025Iowa LegislatureSubcommittee recommends passage.
- Apr 28, 2025HouseWithdrawn. H.J. 1073 .
- Apr 23, 2025SenateIntroducedRead first time, passed on file. S.J. 863 .
- Apr 23, 2025HouseMessage from House. S.J. 863 .
- Apr 23, 2025Iowa LegislatureSubcommittee Meeting: 04/28/2025 12:30PM Lobbyist Lounge.
- Apr 22, 2025HouseImmediate message. H.J. 1033 .
- Apr 22, 2025HouseFloorPassed House , yeas 90, nays 2. H.J. 1027 .
- Apr 17, 2025HouseIntroducedIntroduced, placed on Appropriations calendar. H.J. 987 .
- Apr 17, 2025Iowa LegislatureCommittee report approving bill, renumbered as HF 1025 .
- Apr 16, 2025HouseCommittee vote: Yeas 24. Nays, 0. Excused, 1. H.J. 949 .
- Apr 16, 2025HouseCommittee report, recommending amendment and passage. H.J. 949 .
- Apr 9, 2025Iowa LegislatureSubcommittee recommends passage.
- Apr 8, 2025HouseSubcommittee Meeting: 04/09/2025 8:30AM House Lounge.
- Apr 8, 2025HouseSubcommittee: Bossman, Bagniewski and Gehlbach. H.J. 917 .
- Mar 12, 2025SenateSubcommittee: Koelker, Bousselot, and Petersen. S.J. 507 .
- Mar 11, 2025SenateCommitteeReferred to Appropriations. S.J. 480 .
- Mar 10, 2025SenateCommittee report, approving bill. S.J. 467 .
- Mar 10, 2025SenateIntroducedIntroduced, placed on calendar. S.J. 459 .
- Mar 6, 2025Iowa LegislatureCommittee report approving bill, renumbered as SF 568 .
- Mar 3, 2025Iowa LegislatureSubcommittee recommends passage.
- Feb 25, 2025SenateSubcommittee Meeting: 02/26/2025 9:30AM Senate Lounge.
- Feb 25, 2025Iowa LegislatureSubcommittee: Bousselot, Klimesh, and Petersen.
- Feb 25, 2025Iowa LegislatureIntroducedIntroduced, referred to Commerce.
- Feb 13, 2025HouseIntroducedIntroduced, referred to Appropriations. H.J. 319 .
Version history
Only one version on file - nothing to compare yet. As later stages (committee substitute, engrossed, enrolled) are captured, the redline appears here.
View official text →Lobbying Activity
No state lobbying filings in our records match this bill. Federal lobbying reports (LDA) cover Congress, so they are not listed on state bills.
Full breakdown
Who this bill affects and the strongest case for and against it, written only from the bill’s own text.
Discoveries
Patterns POLISCOPE noticed across the record. These are observations to investigate, not conclusions.
Conditional Interstate Farm Equipment Exemption
The legislation ties interstate highway vehicle restrictions directly to the creation and opening of alternative local bypass routes for agricultural machinery.
Connected Entities
Sources
www.legis.iowa.gov
Analysis Score
0–100- Significance60How much this matters to a regular citizen
- Controversy15Intensity of disagreement among stakeholders
- Entertainment5Compellingness for a non-policy-wonk reader
- Buzz20Current news / social attention level
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