This is now the current map for my buildserver!
It's good to see someone in the mapping community that's striving for excellence. I've never had better performance from a gmod map online. And I really appreciate the attempt to make not only the map functional, but pleasing to the eye. I often find myself just gazing at the sun, with sunbeams post-processing on, in the secret wooded area, whilst other players go about their thing. More maps should have a sun like this one. Bright, and blinding when looking directly at it. That's realism.
I'm amazed at how well you did the car npc's. All the reset buttons are great map self-preservation devices, though I would've recommended that you had possibly one fix all button just in case something really important got deleted like the big doors to the underground area. The only other environment's I'd love to see on your map would be a snow environment, and possibly a combine environment, which would probably be some kind of combine structure. Other than that, you didn't leave much undone.
The apartment building was a nice addition. I've setup many a tactical shooter scenario in there, using npc's and allowing players to clear the building out. I've had some people mention a screen for an rt camera for the racetrack so players can remain seated and get a view of the action from either a dash-mounted, player-made, rt camera, or maybe even some kind of helicopter that follows whomever's in the lead. That's the ideas and suggestions I've gathered from both myself, and the players who come to my server.
In a nutshell, awesome work! I'd really love to see more gmod maps by you. :D