In 2014, I tested out a redesign of the ubiquitous but notoriously confusing parking sign. I went guerrilla starting with the sign outside my apartment. Once I knew the concept made sense to others, I wanted to make sure it worked for all cities. I couldn't be in everywhere at once so I brought it online to get feedback from drivers and regular people like you.
I set out to answer one question: Why can't parking signs be this simple? This resonated so much with people that it found its way into city government. Today, it's in cities like Los Angeles, Boston, New Haven, and Brisbane, helping drivers save time and money by as much as 60%.
This was an experiment by Nikki Sylianteng who's gotten one too many parking tickets and believed there must be a better way. See Louis C.K. illustrate the problem perfectly.