AAR Operating-Transportation (OT-Circulars)


Recommended Operating Practices for "Schnabel" and other Special Cars Equipped with Span Bolsters (appendix updated monthly)


Open Download
OT-3 Timely and Accurate Reporting of Mileage Earned by Private and Railroad Owned Cars Operated on a Mileage Basis Of Compensation — Time Limit Within which Private Car Owners May File Claims 1/1/12 Open Download
OT-5 Rules Governing Assignment of Reporting Marks and Mechanical Designations 1/1/09 Open Download
OT-6 Instructions Pertaining to The Movement of Cars of Private Ownership and Carriers' Responsibility for Mileage Caused by Railroad Error 9/1/81 2/1/12 Download
OT-7 Uniform Application of Mileage Tariff Governing the Computation of Mileage Allowances on Cars of Private Ownership 1/1/12 Open Download
OT-8 Uniform Application of Per Diem Rules to Cars Delivered Industries and Taken Out and/or Forwarded By Other Than The Delivering Road 7/1/78 9/1/12 Download
OT-10 Code of Car Service and Car Hire Rules – Freight Updated Monthly
Open Download
OT-16 Application of Transportation and Car Hire Charges for Bad Order Cars, when Owner Responsibility or Handling Line Responsibility 1/1/12 Open Download
OT-17 Recommended Practices for Inspecting, Testing and Repairing Industry Track Scales 4/1/13 Open Download
OT-18 Recommended Operating Practices For Control of End of Train (E-O-T) Devices 12/1/90 Open Download
OT-21 Experimental Load Cards 9/1/73 6/1/13 Download
OT-22 Recommended Reporting Standards for Shipments Moving under Car Haulage Agreements 1/1/12 Open Download
OT-23 Removal of Owner's Registered Reporting Marks Or Initials From Locomotives, Passenger, Freight And TOFC/COFC Equipment At Time Of Sale 11/1/81 6/1/13 Download
OT-24 Rules Governing the Reporting of Valuation and Age Data on Freight Cars and Superstructures Bearing Railroad Reporting Marks for Car Hire Rate Purposes 1/1/12 Open Download
OT-26 Handling Loads of Dimensions in Excess of Published Clearances and Locomotives, Cranes and Industrial Equipment Moving on Own Wheels 6/1/81 6/1/13 Download
OT-28 Short Line Connections 12/1/13 Open Download
OT-30 Rules Governing the Application, Inspection, Recording and Care of Car Seals 6/1/83 4/1/13 Download
OT-34 Procedures for Inspection and Reporting Car Grades 6/1/13 Open Download
OT-36 Code of Trailer and Container Service and Reporting Rules 9/1/92 Open Download
OT-37 Supplemental Car Hire Charges for Rehabilitated Cars 5/1/86 2/1/12 Download
OT-38 Description, Marking, Numbering and Reporting of Articulated Cars 11/1/12 Open Download
OT-41 Track Scale Calibration Program by the Federal Grain Inspection Service—U.S. Department of Agriculture 6/3/11 Open Download
OT-42 Uniform Mileage Format, Detail Report & Summary Reports for use in Reporting Data to Private Car Owners and Mileage Equalization for Private Tank Cars Per Mileage Tariff 7 Series 7/1/92 2/1/12 Download
OT-44 Handling Loads of Extraordinary Value 9/15/80 4/1/13 Download
OT-48 Instructions for Handling Damaged Tank Cars Stenciled “Home for Repairs—Do Not Load” 6/1/13 Open Download
OT-49 Procedures for Notification of Operating Personnel in Connection with the Movement of FRA Defective Freight Cars Home for Repair 6/1/13 Open Download
OT-53 Documentation Requirements for The Acceptance of TOFC/COFC Shipments 9/1/83 Open Download
OT-54 Shipments of Hazardous Materials/Dangerous Goods to or through Canada 11/21/85 Open Coming Soon
OT-55 Recommended Railroad Operating Practices For Transportation of Hazardous Materials 8/5/13 Open