State And Provincial Line Signs

One of my favorite hobbies is taking long road trips. A few years ago, it occurred to me to start taking photos of state line signs as a memento of my travels. Here is my collection as it stands. Many of the photos were taken from car windows while moving, others at dusk, dawn, and even in the dark. 42 down, 8 to go (New England, Alaska, and Hawaii).

I am not sure if Hawaii has a state line. I have recently learned that the District of Columbia has now started putting up signs, and I have seen photos of the Alaska state line signs. I have a future trip planned along the Alaskan Highway, so I expect to get photos of the Alaskan signs in the next year or two. I also want to tour along the St. Lawrence Seaway, which could put me in a position to get most of the Canadian and New England entry signs.