49 C.F.R. § 174.85 Position in train of placarded cars, transport vehicles, freight containers, and bulk packagings.
Title 49 - Transportation
(a) Except as provided in paragraphs (b) and (c) of this section, the position in a train of each loaded placarded car, transport vehicle, freight container, and bulk packaging must conform to the provisions of this section. (b) A car placarded “RADIOACTIVE” must comply with train positioning requirements of paragraph (d) of this section and must be separated from a locomotive, occupied caboose, or carload of undeveloped film by at least one non-placarded car. (c) A tank car containing the residue of a hazardous material must be separated from a locomotive or occupied caboose by at least one rail car other than a placarded tank car. (d) Position of rail cars in a train. In the following table: (1) Where an “X” appears at the intersection of a Placard Group column and a Restriction row, the corresponding restriction applies. (2) “Rail Car” means a car other than a tank car. (3) For purposes of this subpart, each unit of an articulated intermodal rail car shall be considered as one car. [Amdt. 174–68, 55 FR 52680, Dec. 21, 1990, as amended at 57 FR 45464, Oct. 1, 1992; Amdt. 174–83, 61 FR 28678, June 5, 1996; Amdt.174–83, 61 FR 50255, Sept. 25, 1996; Amdt. 174–83, 61 FR 51339, Oct. 1, 1996; 64 FR 51919, Sept. 27, 1999; 66 FR 45383, Aug. 28, 2001]
Title 49: Transportation
PART 174—CARRIAGE BY RAIL
Subpart D—Handling of Placarded Rail Cars, Transport Vehicles and Freight Containers
§ 174.85 Position in train of placarded cars, transport vehicles, freight containers, and bulk packagings.
Position in Train of Placarded Cars Transporting Hazardous Materials---------------------------------------------------------------------------------------------------------------- Placard Group Placard Group 2 Placard Group 3 Placard 1 -------------------------------------------------- Group 4 RESTRICTIONS --------------- ------------- Rail Car Tank Car Rail Car Tank Car Rail Car Rail Car----------------------------------------------------------------------------------------------------------------1. When train length permits, X X ........... X placarded car may not be nearer than the sixth car from the engine or occupied caboose.2. When train length does not X X ........... X permit, placarded car must be placed near the middle of the train, but not nearer than the second car from an engine or occupied caboose.3. A placarded car may not be X X ........... X placed next to an open-top car when any of the lading in the open top car protrudes beyond the car ends, or if the lading shifted, would protrude beyond the car ends..4. A placarded car may not be X X ........... X placed next to a loaded flat car, except closed TOFC/COFC equipment, auto carriers, and other specially equipped cars with tie-down devices for securing vehicles. Permanent bulk head flat cars are considered the same as open-top cars.5. A placarded car may not be X X ........... X placed next to any transport vehicle or freight container having an internal combustion engine or an open-flame device in operation..6. Placarded cars may not be placed next to each other based on the following: Placard Group 1.............. ............. X X X X X Placard Group 2.............. X ........... ........... X X X Placard Group 3.............. X X X .......... .......... X Placard Group 4.............. X X X X X----------------------------------------------------------------------------------------------------------------PLACARD GROUP:Group 1_Divisions 1.1 and 1.2 (explosive) materials.Group 2_Divisions 1.3, 1.4, 1.5 (explosive), Class 2 (compressed gas; other than Div 2.3, PG I, Zone A), Class 3 (flammable liquid), Class 4 (flammable solid), Class 5 (oxidizing), Class 6 (poisonous liquid; other than Div 6.1, PG I, Zone A), and Class 8 (corrosive) materials.Group 3_Divisions 2.3 (Zone A; poisonous gas) and 6.1 (PG I, Zone A; poisonous liquid) materials.Group 4_Class 7 (radioactive) materials.
