Thanks. I knew there was a picture of that somewhere but could not recall where so I didn't do a post on it.The marker is the sae as a C.I. milepost. The Allegheny Div Safety sign is what I was thinking about,although not like the Alleg. Div Zone B sign post. I can not get to my PC ETT's but maybe Dave can check his or someone who has Central Reg ETT No.1 or No.2 to see if there is a map in those ETT's designating transportation zones within the region. Chip,can you shed any light on this?