After much fussing, I got the street routing worked out. I haven't had any routing issues or Nraas error messages... YAY!!!
I haven't run it with Story Progression which will be my next task. It has been fun to try new things. I rebuilt the Bowling Alley from the university so that it fits on a smaller lot. Figuring out how to build the half-wall that is used on a lot of the standard EA buildings was a challenge. Here is my recreation, needs a few touch-ups before I will upload to exchange. I'm also working on apartment buildings just so all the npc sims have a place to live.
https://1.bp.blogspot.com/-kv44RTzwKx8/XodzR-X9B7I/AAAAAAAAPPQ/mgTi-xaq84khm1cZV_r2CAPsfR5MIRCCwCLcBGAsYHQ/s640/Screenshot-4.jpg
One of the big questions is how many lots should the world have? And what expansions should it support? The only expansion I don't have right now is "Pets".