If I remember correctly I think there is some kind of electrical substation right there with a gravel driveway leading to, probably where the gravel came from, a service truck pulling out of there back onto the ramp probably dragged it out onto the ramp. Or I suppose a dump truck could have simply lost it too. BTW, glad you are okay! EDIT: Just looked on google earth, the substation I remember is on the other side of the road inside the cloverleaf when going 315 south to 270E.