Thank you for your suggestion. In Madison County, NC that state road numbers are displayed on the street signs although the letters are a little bit smaller than the ones used in the street name (about 1/2 the size). Is the visibility of the letters the issue here or is it something else. I went ahead and made the change you suggested for the old section of US 23. Now I'm wondering if I need to do all the other state roads as well. The source I used for the addresses is Madison County's GIS website.