For those of us with tractor trailers or RVs the world of navigation can be confusing. Will our vehicle be able to pass through? fit under low bridges?Luckily the NYS DOT has provided us with helpful signs like “ cars only”. These signs are everywhere, in places where a potential drivers might decide to venture on parkways/roadways. This sign also holds a secret geocache, for those geocachers lucky enough to own an RV or tractor trailer.