Answer: Yes. The court should admit the testimony.
Step-by-step explanation:
Based on the information given, the court should admit the testimony in order to prove that the defendant was aware about the fact that the mudflap assembly was loose.
This can be infered from the information given from the testimony of
the witness, whom was another truck driver who was on the same highway at the time, as he heard someone tell the defendant over CB radio that he had noticed at the truck stop that the defendant's mudflap assembly on his truck was loose.