Pierce County v. Guillen

We address in this case whether 23 U. S. C. §409, which protects information “compiled or collected” in connection with certain federal highway safety programs from being discovered or admitted in certain federal or state trials, is a valid exercise of Congress’ authority under the Constitution.

I

A

Beginning with the Highway Safety Act of 1966, Congress has endeavored to improve the safety of our Nation’s highways by encouraging closer federal and state cooperation with respect to road improvement projects. To that end, Congress has adopted several programs to assist the States in identifying…