A trivia question forPG, perhaps not too far off topic.
The CA Motor Vehicle guidelines/codes are very strict about littering the roads. It specifically says 2 distinct things may be discarded on the highways.
Which 2 ? One is quite easy - the other would take a lot of guessing if not known.
In California stop signs are just suggestions.
The over- riding rule for all signs and limits is -
What is safe under the present conditions. The example is spot on as perhaps under certain circumstance it is unsafe to stop and no citation is made. Good one . The basic rule allows for interpretation by law enforcement/ judge to evaluate individual cases. Quite similar to “no outside assistance of any kind” as written in the Fair play rules . That is all that is said leaving matters for deliberation and evaluation by the proper authority.