Final answer:
Yes, you need to stop before a RR crossing when hauling Division 4.3 materials.
Step-by-step explanation:
Yes, you need to stop before a RR (Railroad) crossing when hauling Division 4.3 materials.
Division 4.3 materials refer to dangerous substances that are prone to detonation or explosion, such as explosives and pyrotechnics. These materials pose a significant risk when transported, as they can cause severe damage or harm.
Stopping before a RR crossing is necessary to ensure the safety of both the transporter and the general public. It allows for a thorough inspection and preparation to navigate the crossing cautiously.