What is the operating speed limit for trains transporting Poisonous-by-Inhalation (PIH) in ABS territory without CSS?

The operating speed limit for trains transporting Poisonous-by-Inhalation (PIH) materials in ABS (Automatic Block Signal) territory without Centralized Traffic Control (CTC) is 40 MPH. This limit reflects the heightened safety protocols connected to the transport of hazardous materials, as lower speeds can mitigate risks associated with potential spills or accidents. At this speed, the crew can effectively respond to emergencies while maintaining control of the train, minimizing potential consequences of a hazardous material incident.

Other speed limits would not align with the regulations set forth for the transport of PIH materials in these specific operating conditions, offering a clear and consistent framework for ensuring safety during potentially dangerous situations on the rail network.