Traffic signs or road signs are signs erected at the side of roads to provide information to road users. With traffic volumes increasing since the 1930s, many countries have adopted pictorial signs or otherwise simplified and standardized their signs to facilitate international travel where language differences would create barriers, and in general to help enhance traffic safety. Such pictorial signs use symbols (often silhouettes) in place of words and are usually based on international protocols. Such signs were first developed in Europe, and have been adopted by most countries to varying degrees.
Please, put the cache back exactly as you found it, in order not to fall off from it's place! Thank you!!
P.S. Check the whole log, maybe is something more in it!