AAR’s Safety and Operations department is amending AAR Circular No. OT-55 by deleting the Canadian Only “T” code section from Appendix A and B of this document. This amendment reflects the changes in the Canadian Transportation of Dangerous Goods Regulations (TDGR). This Circular letter only impacts Appendices A & B.
AAR’s Safety and Operations department is adding a section to OT-55 reflecting the railroad industry’s commitment to providing electronic emergency response information. This is the only change from OT-55-P. AAR Circular No. OT-55-Q (attached) becomes effective September 6, 2018 and supersedes OT-55-P. .
Based on recommendations of the Inter-Industry Task Force on the Safe Transportation of Hazardous Materials by Rail, AAR published Circular No. OT-55 on January 4, 1990 to document recommended railroad operating practices for the transportation of hazardous materials.
On March 17, 2009, AAR’s Safety and Operations Management Committee approved changes to AAR Circular No. OT–55, resulting in revised recommended operating practices for the transportation of hazardous materials.
SUBJECT: Recommended Railroad Operating Practices for Transportation of Hazardous Materials . TO MEMBERS AND PRIVATE CAR OWNERS: . OT-55 has been revised as reflected below. OT-55-N (attached) becomes effective August 5, 2013 and supersedes OT-55-M, issued October 1, 2012.
OT-55.pdf | Railinc
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2023年10月1日 · AAR Circular No. OT-55-R Dated October 1st , 2023 (attached) becomes effective October 1st , 2023 and supersedes all previous versions. Under the provisions of Standard S-050, which may be found on the TTCI web site (www.AAR.com), this circular reflects the final action on this matter.
会喷火的五对负重轮，苏联TO-55喷火坦克，火焰与炮弹齐飞
坦克内安装460升容量的燃料箱，巨大的容量能够支持喷火器进行长时间喷射，与单兵携带的喷火器不同的是，TO-55喷火坦克可不需要士兵拿着打火机去点火，而是完全自动化的，炮手只需要按下触发按钮，气瓶就能催动混合燃料喷出并达到
2021年4月20日 · AAR’s Safety and Operations department is amending OT-55 by adding back in Appendix 3, the list of Environmentally Sensitive Chemicals. The Sample Request for Hazardous Materials Commodity Flow Information will now be in Appendix 4.
AAR Operating-Transportation (OT-Circulars) | Railinc
Periodically, the Association of American Railroads (AAR), in consultation with industry experts, issues guidance on a wide range of topics related to rail transportation. This guidance is published in OT circulars. Below is a list of the circulars currently in effect as well as a …