Federal highway funds now tied to state DWI interlock mandates

What it does

This bill establishes a federal requirement that states mandate ignition interlocks (devices that prevent a car from starting if alcohol is detected on the driver's breath) for all DWI offenders for a minimum of 180 days. States that do not enact and enforce such a law will lose 3% of federal highway funding in 2027 and 5% in subsequent years. The bill uses federal highway funding as leverage to push all states toward a uniform DWI interlock standard.

Why we flagged it

The bill's core mechanism is a federal highway-funding withhold tied to state adoption of a uniform DWI interlock policy. It is framed as a public-safety measure (reducing repeat DWI offenses) but operates as a coercive federalism tool, using fiscal leverage to override state criminal-justice autonomy.

What the text implies

• Interlock manufacturers (Alcohol Monitoring Systems, SmartStart, Guardian Interlock) stand to gain significant revenue from mandatory installation and monitoring across all 50 states, creating a private-sector beneficiary from a public-safety mandate.
• States with existing interlock laws (31 states + DC) face no new burden, but states without such laws must either enact them or forfeit 3–5% of highway funding—a substantial penalty that may force compliance regardless of local criminal-justice philosophy.
• The bill does not address affordability or indigency waivers; low-income DWI offenders may face financial barriers to compliance (interlock costs + monitoring fees), potentially creating a regressive enforcement pattern.
• Federal highway funding withhold creates a ratchet: once a state enacts the interlock mandate to recover funds, repealing it later would trigger the same penalty, locking states into the policy indefinitely.
• The bill's definition of 'violation' (failing breath test, tampering, circumventing) is left to state law, creating potential inconsistency in enforcement and removal timelines across jurisdictions.

Section numbers refer to the bill text the analysis read — linked under Primary records below.

Who it affects

The bill advances public safety by reducing repeat DWI offenses (studies show 70% recidivism reduction while interlocks are installed) and addresses a documented rise in impaired-driving fatalities. However, it imposes a mandatory technology requirement on DWI offenders that may create financial hardship (interlock installation and monitoring costs typically $1,000–$2,500 annually) and raises federalism concerns by using highway-funding coercion to override state policy choices on criminal penal

Who stands to gain

• Ignition interlock manufacturers and service providers (Alcohol Monitoring Systems, SmartStart, Guar
• Breath-testing equipment suppliers
• Monitoring and compliance service companies

Named in the bill

U.S. Department of Transportation (Secretary), States (all 50 + DC), Mothers Against Drunk Driving (MADD), National Highway Traffic Safety Administration (NHTSA), National Conference of State Legislators, Ignition interlock manufacturers, Title 23, United States Code (federal highway law), Section 104(b) (federal highway apportionments), Section 164 (DWI penalties), Section 405 (highway safety programs)

Where it stands

14 cosponsors: 10 Democrats, 4 Republicans.

• Apr 9, 2025 — Introduced · Congress.gov: “Introduced in House”
• Apr 9, 2025 — Referred to House Committee on Transportation and Infrastructure · Congress.gov: “Referred to the Subcommittee on Highways and Transit”

Dates and quoted wording are Congress.gov's action record; the timeline shows status changes, not every procedural step.

Money around this bill

3 lobbying clients named this bill on 4 disclosure filings across 2 quarters, Dec 2025 to Jun 2026. Those filings disclosed $1,105,758 in lobbying spend. A filing names 64 bills on average, so that figure is what each filing reported, not a share belonging to this bill.

More lobbying clients named this bill than 61% of bills with at least one filing.

Tracey Mann, the sponsor, reported $687,250 in PAC receipts in the 2026 cycle.

• National Association of Mutual Insurance Companies — $1,005,758 on 2 filings
• Safety and Advocacy for Empowerment (safe) — $60,000 on 1 filing
• 1a Smart Start LLC — $40,000 on 1 filing

Lobbying Disclosure Act filings through Jul 20, 2026. A filing shows who paid to lobby on a bill it names, not what changed.