Goldhunter, EW road first and then not far behind should come the rail line. Even simple creatures like ants, groundhogs and moles know that you have different routes to enter and exit where they build their burrows. Humankind should, many times, follow examples of what is seen in nature. In this case, follow what has become a tried and true observation seen with our not so simple creatures. Build more than one access to home base.There are obvious reasons if we think about it. Have a wonderful weekend all. the deputy