550	MARKERS, PLAQUES AND TRAFFIC CONTROL DEVICES
55004  *	Beads, Glass, Sign and Stripe
55006  *	Bridge and Railroad Crossing Gates
55008  *	Buttons, Delineators, Reflectors, etc., Reflectorized
55010  *	Cement, Contact (For Traffic Control Markers)
55012  *	Clamps, U-Type, Large (For Highway Signs)
55014  *	Early Warning System, Engine Powered, Trailer Mounted (or for Truck Mounting)
55020  *	Flares and Fusees
55022  *	Gaskets, Traffic Markers and Dividers
55028  *	Markers, Plaques, Placards and Tablets: Dedicational, Historical, Informational, etc.
55030  *	Markers, Traffic, Ceramic: Jiggle Bars, etc.
55031  *	Markers, Traffic, Concrete
55032  *	Markers, Traffic, Metal
55033  *	Markers, Traffic, Fiberglass
55034  *	Markers, Traffic, Plastic and Rubber
55036  *	Marking Compound (Thermoplastic), and Marking Powder
55038  *	Parking Meters and Area Control Equipment
55041  *	Posts, Flexible (For Delineator Markers)
55042  *	Safety Barriers, Traffic, Mobile: Energy Absorption Systems, Impact  Attenuators (Crash Barriers), etc.
55043  *	Safety Barriers, Traffic, Stationary: Energy Absorption Systems, Impact  Attenuators (Crash Barriers), etc.
55044  *	Sheeting, Reflectorized (For License Plates)
55045  *	Sheeting, Reflectorized (General)
55058  *	Signal Torches, Kerosene
55072  *	Stripes and Legends, Plastic, Prefabricated, Reflective
55078  *	Traffic Cones, Lane Markers, and Barricades (Portable)
55080  *	Traffic Controls and Equipment, Electric Systems
55081  *	Traffic Controls and Equipment, Electric Parts
55082  *	Traffic Counters and Accessories
55085  *	Traffic Signal Poles, Standards, and Brackets
55088  *	Traffic Signals and Equipment, Electric Systems
55089  *	Traffic Signals and Equipment, Electric Parts
55091  *	Vehicle Detectors
55093  *	Warning Devices, Telescoping or Fold Up Type; and Accessories
55096  *	Warning Lights, Flashers, and Flashing Arrow Boards (See Class 285-76 for Streetlights and Standards)