What is the implication of the length restriction for semi-trailers?

The implication of the length restriction for semi-trailers primarily ensures safety on highways. Length restrictions are put in place to promote safe operation on public roads, as longer vehicles can be more challenging to navigate, especially in terms of turning, maneuverability, and maintaining control. By limiting the length of semi-trailers, these regulations help reduce the risk of accidents, promote smoother traffic flow, and ensure that larger vehicles can interact safely with smaller vehicles on the road.

The other options focus on benefits that may not be directly correlated with length restrictions. Cargo space may actually be reduced due to length limitations, and visibility at night is more influenced by lighting than trailer length. Fuel efficiency is not directly tied to trailer length but rather to vehicle design and weight distribution. Thus, while each of those factors plays a role in the operation of semi-trailers, safety remains the primary concern driving the enforcement of length restrictions.