@chrls The US Supreme Court disagrees with you: "A routine traffic stop is more like a brief stop under Terry v. Ohio, 392 U. S. 1, than an arrest, see, e.g., Arizona v. Johnson, 555 U. S. 323, 330." (Rodriguez v. United States, 2015 - https://www.supremecourt.gov/opinions/14pdf/13-9972_p8k0.pdf...