The protagonist awakes to find himself with amnesia, and the story is his journey to self-discovery. Two features of the story are nanotechnology in his body, and a world-wide speed limit, displayed in the sky, that is slowly being lowered, enforced by weaponized sattelite.
The world is also divided into zones, with different rules for each zone....not too sure about that last part. The title is two words, "(Something) World", I think.