In most jurisdictions, there is a limit on the maximum number of trailers that can be towed by one vehicle. One vehicle can legally tow 3 trailers under many states' current towing laws as long as the overall length does not exceed a specific measure set by local, state, or federal authorities (often somewhere between 75 to 125 feet, depending on federal, state, and municipal vehicle code). Please remember that municipal, state, provincial, and international laws should check these limitations.
Please verify this information to ascertain any current regulations as laws are subject to change and differ slightly.