"乘车时禁止将头伸到窗外"用英语怎么说?

Forbid the head being stretched to the window outside time riding！！！

keep your head inside the bus正翻不好翻就要反翻哈·

No head sticking out of the window when driving.

"乘车时禁止将头伸到窗外"
Don't poke your head out of a car window.