Is there an annual vehicle safety inspection?
13 Regular safety inspection1 Only at sale or first registration36 No safety inspection
50 states · official sources · checked by a person
How the 50 states differ, mapped and sourced.
QuirkMaps maps the rules and quirks that change at the state line, from which pets you can keep to whether you can pump your own gas. Every answer links to the statute, regulation, or agency page it comes from, so you can check it yourself.
Recent topics
Does the state have a sales-tax-free weekend?
19 Has a tax-free period26 No tax-free period5 No state sales tax
Do you need an ID to vote?
10 Photo ID required14 Photo ID requested11 ID required, non-photo accepted15 No ID document required
Do adults have to wear motorcycle helmets?
17 All riders31 Only some riders2 No helmet law
Are groceries taxed?
37 Groceries exempt5 Taxed at a lower rate3 Taxed at the full rate5 No state sales tax
Are fireworks legal?
2 Consumer fireworks banned17 Sparklers and ground fireworks only30 Aerial fireworks allowed1 Unclear
How QuirkMaps works
Each topic asks a single question, such as whether you can keep a pet armadillo, and answers it for all 50 states. The answer for every state comes from that state's own law: its statutes, its administrative rules, or the agency that enforces them. Every answer links to its source, so you can read the rule for yourself.
- See the whole country at once. Each topic opens with a map colored by answer, with symbols so the map reads without color too. The smallest states get labeled boxes beside the map.
- Drill into a state. Select a state to see its answer in plain language, the details that matter, where the rule comes from, and how confident we are.
- Compare neighbors and regions. Every topic shows how the answer shifts across regions and where it changes at a state line.
Answers are rated high, medium, or low confidence, and when the law is silent or contradictory we say so instead of guessing. Each record shows the date its source was last checked. Research is AI-assisted and checked against official sources, as the methodology explains. QuirkMaps is general information, not legal advice.
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Pick a state to see every topic for it in one place.