At first glance your list looks ok for an urban survival kit. Which for me means I can readily find shelter, water & food. So my "USK" is quite different than the "PSK" I would take into the woods.

You like to stop & hike the AT when your headed to and from the city. This is where I see many holes in your kit. The biggest is shelter. You should have an expedient shelter ready in case you need to spend an unexpected night out in the woods. Water is next on my list. You need a container and a means to purify the water. At a minimum I leave the trailhead with 48-64 oz of water depending on known water sources. I would also add in a fixed blade knife for woods carry. My preference is for a 4" fixed blade but I'm a big SAK fan and the adventurer is a good locking folder. When I go out with minimal gear the knife gets bigger to handle chores such as shelter building. You seem a little light in the signal department a good signal mirror would be a big plus.