Association of American Railroads’ NAR Program captures U.S. and Canadian data on non-accident releases, maintains a computerized database of these incidents and encourages the industry to address the causes of the releases.
AAR does not release information concerning the incidents reported in this program without your consent. Any statistics we release with respect to incidents occurring over time will be aggregate numbers, and will not identify the individual shippers or carriers involved. Summary data is available to help you track your individual progress in reducing NARs.
The AAR looks forward to continuing progress in this cooperative, inter-industry program to address a problem of mutual concern.
- A hazardous materials NAR is the unintentional release of a hazardous material while in transportation, including loading and unloading while in railroad possession, that is not caused by a derailment, collision or other rail-related accident.
- NARs consist of leaks, splashes, and other releases from improperly secured or defective valves, fittings, and tank shells and also include venting of non-atmospheric gases from safety relief devices.
- Effective January 1997, normal safety venting of atmospheric gases such as carbon dioxide and nitrogen is no longer considered a NAR.
- The vast majority of reported NARs involve small quantities.
Data & Tools
Grand Slam & Holden Proefrock Award Winner Photos
- 2018 Data Slides for Task Force
- Tank Car NAR Data Breakdowns for 12 Months Ending December 2017
- AAR/BOE Annual Report of NARs (2017)
- Do’s & Don’ts Poster for Pressure Cars
- Do’s & Dont’s Poster for Pressure Cars (Spanish LPG Tank Car)
- Do’s & Dont’s Poster for Pressure Cars (Spanish Brochure)
- Do’s & Don’ts Poster for General Service Cars
- Pamphlet 34
- Inspection & Securement Guidelines
- Guidelines for Top Operated Bottom Outlet Valves
- Preventing Fuel Ethanol NARs
- Reducing HCL NARs
- Reducing HCL NARs
- Effectiveness of Tank Car Safety Vent Surge Pressure Reduction Devices
- Inert Gas in Anhydrous Ammonia Tank Cars
- Suggestions for Effective Railroad Tank Car Loading/Unloading Training Programs
- Recommended Practices for Loading/Unloading Anhydrous Ammonia Tank Cars
- Common Causes of O-ring Failures Poster
- Temperature Guidelines Memo for Pressure Relief Valve O-Rings
- Industry Manway Survey
- Improving Securement in Hazardous Materials Tank Car Shipments
- Renewable Safety Advance
- Statistical Approach to Estimating Surge Pressure Reduction Devices’ Performance