Hi! Indeed weird situation, the sign is half-way through. I'm not the original contributor from that parking but from my experience, when i've been mountain biking in this area, I've been parking there time to time for more than 15 years, never had a problem and I've seen other cars too. Since there is a sort of public recreation/picnic area, great chances that it is indeed a parking otherwise i don't see how people from other towns could take advantage other than going by bicycle or hiking.