Final answer:
The standard legal width for a truck hauling its load is 102 inches (8 ½ feet) to comply with public road safety and infrastructure compatibility. So, the correct answer is 2) 102 inches (8 ½ feet).
Step-by-step explanation:
The greatest width ordinarily allowed by state law for a truck hauling its load is 102 inches (8 ½ feet). This regulation is to ensure that vehicles can safely traverse public roads without impacting traffic flow or road infrastructures. Over-width vehicles typically require special permits to operate on roads. The industry standard for trucks, taking into account their load and safety requirements, falls under this width limit, making them compatible with various transport and infrastructure specifications, such as lane size and bridge clearances.
Thus, the correct answer is 2) 102 inches (8 ½ feet).