[Edwin320]

Florida has a similar law as the one you cited. There is some pretty specific case law that defines the scope of hampering or impeding a public official in the performance of the public official's lawful duties that narrows the scope of those duties such that flashing lights would not qualify as obstruction. Basically, unless you have a specific target in your enforcement operations in Florida, generally warning about the presence of a speed trap is constitutionally protected under the First Amendment. I am not familiar with Ohio case law, or with jurisprudence related to the specific statute you cited, but I don't see how any statute that limits freedom to flash your lights to warn oncoming drivers of a speed trap could survive constitutional scrutiny. It probably can't.