What should you refer to if a railcar or road trailer is involved?

The appropriate reference for railcar or road trailer involvement is found within the specified pages that typically contain critical information regarding hazardous materials, transportation protocols, and safety procedures. These pages likely detail the procedures for handling incidents involving these types of vehicles, the necessary precautions to take, and the legal requirements for first responders.

Pages 10-13 may focus on the foundational aspects of transport and the regulations associated with it, making them relevant for understanding initial response protocols but not specific enough to cover particular types of vehicles like railcars or road trailers in depth. Meanwhile, other options might cover additional topics, but the content in Pages 10-13 aligns best with the necessary information for handling situations involving railcars and road trailers effectively.