Final answer:
It is illegal to transport explosives in a trailer when towing it on a public road.
Step-by-step explanation:
When towing a trailer on a public road, it is illegal to transport explosives. Explosives are highly dangerous to transport on public roads due to the risk of accidents and potential harm to the public. It is important to always follow the law and ensure that you are not transporting any illegal substances when towing a trailer.