The court ruled that signs like the one shown above are forced speech in contradiction of First Amendment rights of utility companies. Source: Newsday.

In a decision that could have far-reaching consequences, earlier this year, a federal court in New York found a town law requiring the placement of warning signs on utility posts violated the First Amendment as a content based restriction on noncommercial speech.

In 2014, the Town of North Hempstead, New York adopted a local law requiring warning signs on utility posts in the town.  The law came about following local opposition to the erection of a new overheard electricity transmission line through the town.  As part of the project, the Long Island Power Authority (LIPA) and PSEG Long Island LLC (PSEG) placed new utility poles
Continue Reading Court:  Utility Pole Warning Signs are Forced Speech in Violation of First Amendment