Stenciled message above the vicinity of the driving cab of the preserved New Haven Railroad Budd Rail Diesel Car Number 32 at the Danbury Railway Museum, in Danbury, Connecticut. The message is above the closed front door, and tells passengers that it's illegal to stand on the platform. Obviously that law is null and void when the train isn't running.
<a href="//commons.wikimedia.org/wiki/User:DanTD" title="User:DanTD">DanTD</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>