Unfortunately yes ... County Boundaries or changes, new roads/bypasses, local changes. All of the Byways at sometime had to go somewhere so probably all were once through roads but yes, there are many that simply stop ... often with no turning circle, so it's reverse all the way .. In this case the railway, as they are able to do quite easily I believe, simply locked the gated crossing due to 'Safety Reasons', which is the hardest thing to fight against!