Friedrichs crowd control barricades, fencing, steel barriers,... Barricades, barriers, crowd control, stanchions, bike racks, police fencing direct from the barricade manufacturer... by the New Orleans Police Dept. Along with the original crowd control model we also have a complete line of barricades to choose from. Over four decades of experience and innovations have... interlocking Crowd Control Barricades over 45 years ago for the City of New Orleans to assist in handling the crowds during Mardi Gras. Most of these barricadesare still used today...