Route and approximate timing information is here.
You don’t even need to announce you are coming. Just wait for me at a gas station parking lot, or tell the bus driver to let you off when you see me walking along the shoulder of the road. I will be traveling with backpack, tent, and sleeping bag, and a hefty dose of “I-have-no-idea-what-to-expect,-but-I-guess-I’ll-find-out” spirit.
My progress will be very predictable, insallah, and my position at any given time will be public knowledge. So if you are looking for a way to hide out from the law or whatever, you should probably find some other way to do it. However, if you want to get to know an amazing country from a fairly unusual perspective, and to make some memories that will last a lifetime, consider doing something like this.