The American Civil Liberties Union of Minnesota recently brought together the Minnesota State Patrol with freeway demonstrators to talk after numerous demonstrators were hassled or asked to leave the overpasses by the State Patrol. State Troopers claimed that the signs the protestors were holding were distracting the drivers and were dangerous.
During the meeting, ACLU-MN facilitated the discussion between the two groups and reminded them that the first amendment protects the rights of individuals to hold signs on overpasses, as long as they follow a certain set of rules.
Minnesota State Highway Patrol agreed that the law did indeed protect the demonstrators' right to be there, and said that they would remind their officers and dispatchers of their policy: