StateIowa

SF 378: A bill for an act relating to speed limits, including the speed limit range for which certain excessive speed violations cannot be considered for certain purposes and the default speed limit for all vehicular traffic, and making penalties applicable.

COMMITTEE ON TRANSPORTATIONIntroduced

SF 378 status: Introduced — Fiscal note (updated Jun 2, 2026).

1

What this bill does

Overall score

Score50/100 civic fit
RiskHigh risk
ImpactModerate impact 65/100

Bill summary

Official

A bill for an act relating to speed limits, including the speed limit range for which certain excessive speed violations cannot be considered for certain purposes and the default speed limit for all vehicular traffic, and making penalties applicable.. Currently in Senate.

Key analysis

Constitutionality90%
Bipartisan70%
Public opinion80%
2

Impact analysis

Environment

Critical Outlook
40%

Benefits

  • None identified

Risks

  • Increased fuel consumption and greenhouse gas emissions associated with higher driving speeds

Economy

Positive Outlook
60%

Benefits

  • Reduces consumer financial impact from minor speeding infractions
  • Potential for improved commute efficiency

Risks

  • Insurance industry may adjust base rates to account for changes in driving record transparency

Society

Mixed / Neutral
50%

Benefits

  • Less punitive approach to minor traffic violations for drivers
  • Modernizes legal speed ranges to match current road usage

Risks

  • Increased potential for traffic accident severity due to higher default speed limits
  • Administrative complexity in updating signage and historical traffic data records
3

How trustworthy & consequential it is

Source

LegiScan

Confidence

high

high

Analysis status

LegiScan full bill text

Warning

Increasing the default speed limit to 60 mph may increase the severity of traffic collisions

Limitation

Long-term impact on traffic safety statistics is speculative

4

Where it stands

1

Introduced

Current

Fiscal note.

2

Committee

Upcoming
3

Floor

Upcoming
4

Governor

Upcoming
5

Enacted

Upcoming
5

How it affects your district

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6

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