Arnold, MO. A controversial trap has been set up at this and 2 other intersections in Arnold, MO. Cameras to catch motorists speeding through the stop lights have been installed by a contractor. The other 2 intersections are at; I-55 and Richardson, Jeffco again in front of the school. It should be noted that these cameras have shortened the time the yellow light stays on. All of this while they sit on I-55 and pick off motorists.