Description:00 05 50 00 Seattle. Invention by a lieutenant of police Mr Carr to settle the problems of traffic, the traffic jams. In front of model, lieutenant explains to resolve the traffic. Close-up on model with figurines. Seen on street with pedestrians and streetcar. Seen on traffic jam. Finalized by a system of regulation, sight on street with forges fluid. Policeman on horse steers the pedestrians. Pedestrians cross street.