Heard a crew some when they were paving and striping last month just a couple of miles from home. Looks like they use listed frequencies but, only simplex operation, no repeater use. I can remember hearing crew from Joppa salting roads all over North Alabama back in the 80's & 90's and knew where any road issues were. Wish they would go back to that as website(ALDOT'S) is a pain to use.