*If you are traveling from Dublin and have gone through Plain City on 161, you will come to a stop sign in Irwin where Rt. 4 merges with 161. Follow the signs for 161, but be away that a few miles further, right before you get to the golf course, Rt 4 will separate from 161 and veer left sharply. Make sure that you stay on 161 then entire way as it stays straight at that separation.