I agree. While, at least to my knowledge (I may be wrong), entering a closed road is not against the law, it will mean that there´s no liability for anything that might happen to you or your car. And when they say that the road is gone, it may literally be gone - a couple of years ago I saw it washed away for more than 10 feet, leaving a trench with vertical walls 7 or 8 feet deep crossing the road, and without a chance to bypass this spot.