Final answer:
If you are carrying Division 1.2 or 1.3 materials, you must park your vehicle at least 300 feet away from the traveled portion of the roadway, which is about 8 car-lengths.
Step-by-step explanation:
According to regulations, if you are carrying Division 1.2 or 1.3 materials, you must park your vehicle at least 300 feet away from the traveled portion of the roadway. This distance is equivalent to approximately 8 car-lengths. It is important to park at this distance to ensure the safety of other drivers and pedestrians, as these materials can be highly hazardous.