<P> In Minnesota, drivers are not prohibited from briefly flashing their high beams in a manner that does not blind or impair approaching drivers . </P> <P> In Missouri, a trial judge in St. Louis held that drivers have a First Amendment right to flash their headlights . </P> <P> In New Jersey, drivers are allowed to flash their headlights to warn approaching drivers about a speed trap ahead . In 1999, The Superior Court of New Jersey Appellate Division held that a statute limiting how far high beams may project is not violated when a motorist flashes his or her high beams to warn oncoming motorists of radar . The Court also concluded that a stop by a police officer based upon high beam flashing is also improper . </P> <P> In New York, headlight flashing is not illegal . New York Vehicle and Traffic Law Section 375 (3) requires that headlamps "shall be operated so that dazzling light does not interfere with the driver of the approaching vehicle". In 1994, New York Supreme Court, Appellate Division held that flipping or flicking high beams at approaching vehicles is insufficient to cause the "dazzling lights" prohibited under New York Vehicle and Traffic Law Section 375 (3). In 2009, the New York Supreme Court Appellate Division (Fourth Department) held that the flashing of lights alone is not a violation of New York Vehicle and Traffic Law Section 375 (3), that stopping a vehicle based upon that is illegal, and all evidence gathered as a result of the illegal stop should be suppressed . </P>

When are you allowed to use headlights to signal the intention to pass