Road signs in California for weigh stations will say something like: this lane, trucks only (no puckups). Car is used to mean either in most conversations, so I knew what you meant. I liked your analogy and found humor in the fact that the answer to your question was in a way hidden in your question. I intended to answer your question and share the humor I found but I was short on time and instead my comment looks snarky.

In any case, good point.