Association of American Railroads
Equipment Diagrams for Interchange Service

PLATE A

There is currently no Plate A. I have been unable to determine if one ever existed.

PLATE B

Unrestricted interchange service standard adopted 1946. Revised 1972, 1983, 1988.

PLATE C

Limited interchange service standard (will clear 95% of total rail mileage) adopted 1963. Revised 1983, 1988, 1991.

PLATE D

Plate D consists of information for obtaining the maximum allowable width of cars, other than at the centerline of the car, to allow for unrestricted Plate B and limited Plate C, H, J and K interchange service. This includes calculating clearance through difference curvatures of track.

PLATE E

Limited interchange service adopted 1974. Revised 1976.

PLATE F

Limited interchange service adopted 1974. Revised 1976.

PLATE G

There is currently no plate G. I have been unable to determine if one ever existed.

PLATE H

Limited interchange service adopted 1994. Revised 2007. This standard applies to double-stack container cars.

PLATE I

There is currently no plate I. I have been unable to determine if one ever existed.

PLATE J

Limited interchange service adopted 2005. Revised 2007. This standard applies to conventional 19 foot autorack cars.

PLATE K

Limited interchange service adopted 2005. Revised 2007. This standard applies to 20 foot 3 inch autorack cars.

Unrestricted* diagram for single loads, without end overhang, on open top cars. (No plate letter assigned)

*Note: Restricted on certain portions of:
Canadian National Railway
Central of Georgia Railroad
CSX Transportation
Detroit, Toledo and Ironton Railroad
Long Island Rail Road
Maryland & Pennsylvania Railroad
Norfolk Southern Railroad
Staten Island Railroad
Union Pacific Railroad

December 18, 2008