You can't have knowledge skills for everything. You only have so many points, and if you go over your freebies, you start cutting into points that could be used for other things. I think it's kinda unfair to make characters spend points to know how to find the corner market in their own neighborhood.
To go with another example: my players don't know as much about the Shadowrun world as I do. The characters should know where things like Dunkelzahn's Rift is, but ofttimes the players don't. If one piece of common knowledge becomes important, they can make a straight Logic roll for it. Knowledges are for specific things your character knows; Logic is for general knowledge checks.
To go with another example: my players don't know as much about the Shadowrun world as I do. The characters should know where things like Dunkelzahn's Rift is, but ofttimes the players don't. If one piece of common knowledge becomes important, they can make a straight Logic roll for it. Knowledges are for specific things your character knows; Logic is for general knowledge checks.
Which is covered by the Attribute-1 Skill Test normally used for Defaulting. Don't see any problems with that. Which is why the Defaulting rules are there, after all. As I said, I have no real issues with your solution. It only adds 1 Dice to the role, after all. I just do not use that. I stick with the rules for defaulting.