An Independent Research Project for the Informed Commuter.
Providing accessible, legally-cited clarity on vehicle compliance, traffic laws, and commuter rights. Fact-checked against current state statutes.
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Traffic Violation Defenses
Start here for legal questions about DUI, insurance, bicycle laws, and other traffic citations.
54 reports
Vehicle Compliance
Use this hub for state vehicle code questions about emissions, insurance, and equipment requirements.
31 reports
Vehicle Maintenance
Use this hub for troubleshooting noise, vibration, fluid leaks, battery issues, and other maintenance questions.
46 reports
Car Insurance
Use this hub for questions about insurance requirements, billing cycles, claims history, and coverage rules.
46 reports
Commuter Rights
Use this section for questions about rentals, licensing ripple effects, and related commuter constraints.
8 reports
Safety Data & Statistics
Use this section for NHTSA FARS and Census-backed crash statistics, including the year and state reports.
7 reports
Recent Publications
Newly published research reports, technical explainers, and source-cited legal summaries from the Daily Driver Advocate library.
Is It Illegal to Have a License Plate in Your Window?
Research on windshield and dashboard license plate placement — the Texas Court of Criminal Appeals' Spence v. State ruling on the statutory definition of "front," the Montana Legislature's post-Lacasella rewrite of MCA § 61-3-301, California CVC §§ 5200-5201 fastening and height mandates, why ALPR infrared cameras cannot read a plate through glass, the crash-physics case against a dashboard plate as an airbag-deployment hazard, and FMVSS 108/SAE J686/J587 engineering standards behind exterior-only mounting.
Is It Illegal to Leave Kids in the Car?
Research on leaving a child unattended in a parked vehicle — the automotive greenhouse-effect physics behind a 117°F cabin on a mild 72°F day, why a child's core temperature climbs 3-5x faster than an adult's, the state "unattended child" statutes and their age/grace-period/supervisor-age variables, the strict-liability-versus-intent split, general child endangerment and manslaughter prosecution in states without a specific law (including Kentucky's Bryan's Law), Good Samaritan rescue immunity, "Forgotten Baby Syndrome" and the enforcement-disparity data behind it, and the federal rear-seat alert and seat belt reminder rulemakings.
Is Vehicle Registration the Same as Insurance?
Research on the legal difference between vehicle registration and car insurance — the state-record-versus-private-contract distinction, NAIC and Insurance Information Institute definitions, financial responsibility law, New Hampshire's sole no-mandatory-insurance status under RSA 264:20, Virginia's July 2024 repeal of its Uninsured Motor Vehicle fee, electronic insurance-verification systems like TexasSure and California's 45-day cancellation window, and what actually happens when the two records fall out of sync.
Is It Illegal to Leave Your Car Running While Pumping Gas?
Research on engine-off requirements at retail fuel dispensers — the state and local fire-code framework behind pump signage, federal OSHA and FMCSA rules for workplace and commercial fueling, static-electricity refueling-fire findings, and the EVAP-system diagnostic mechanics that can turn an open fuel cap during idling into a check-engine-light event.
Is It Illegal to Have LED Headlights?
Research on LED headlight legality — the FMVSS 108 split between "integral beam" factory LED assemblies and "replaceable bulb" housings, the 49 CFR Part 564 docket that makes drop-in LED bulbs a legal impossibility because an LED chip has no filament or gas-discharge arc to file, the 49 U.S.C. 30122 "make inoperative" prohibition on shops installing them, the optics of why a flat LED chip destroys a halogen reflector's cutoff line and causes glare, DOT/ECE/SAE standard differences, IIHS headlight-rating crash-reduction data, Amazon's 2023 marketplace ban on LED conversion kits, the 2022 federal legalization of Adaptive Driving Beams, and the state-by-state inspection enforcement gap.