October Term 2002 · Docket 01-1229

Can Congress restrict state court access to highway safety data?

Pierce County seeks to block a state court from using federal highway data in a lawsuit.

Official caption
Pierce County v. Guillen
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Argued
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Mr. Clement argued the 1995 amendment is constitutional. He stated it protects data collected for federal highway funds. He claimed this prevents use in state and federal court litigation.

    Mr. Mungia argued the statute fails the South Dakota v. Dole requirements. He stated section 409 is not conditional. He asserted the plain language shows it lacks conditional nature.

    Mr. Hamilton corrected a misstatement by the opposing side's counsel. He addressed the outcome if the Court adopts the United States position. He clarified the plaintiffs' claim regarding document access.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

Pierce County argues a federal law protects highway data from state court use. Guillen argues the law fails constitutional tests and allows the data in court.

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How the case got here

The Supreme Court heard oral argument in this case on November 4, 2002.

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What each side wants

Pierce County wants the Supreme Court to uphold the federal data protection law.

Guillen wants the Supreme Court to allow the state court to use the highway data.

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What each side says

Pierce County argues the law constitutionally shields federal highway data from state litigation.

Guillen argues the law is not conditional and fails the South Dakota v. Dole test.

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What the justices asked

Chief Justice Rehnquist asked if adopting the United States position gives plaintiffs the documents.

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Why it matters

This case defines whether federal highway data remains private in state courts. It determines if states can access this data for litigation. It shapes the balance between federal data collection and state judicial power.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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