How do crosswinds affect a doubles/triples rig?

Answer: A — They increase trailer sway and require smoother, slower driving.

Crosswinds push on the tall, flat sides of a trailer, creating a sideways force that makes the trailer yaw and sway. On a doubles or triples rig, there’s more surface area and a longer overall length, so these wind forces have a greater effect and can make the combination harder to steer. The safest response is to reduce speed and drive with smooth, gradual steering inputs to keep the rig stable and in its lane, avoiding sudden moves that could exacerbate sway. So, crosswinds don’t improve stability, they destabilize it, and they don’t reduce stopping distance. They affect longer rigs as well as single trailers, due to the increased wind surface and the way sway can propagate through multiple trailers.