I finally entered in all of San Diego... It included 312 exits across all the freeways. I then ran it through mapmarker and it was able to find 72% of the intersections. So that left 89 exits off. I attached an updated image. I guess at this point I would have to get those 89 lat/longs individually (take forever) or just say 72% of the exits of a town is good enough.

One thing I have noticed is that from a high view you can't tell the two different lanes on the interstate. You can't differniate between North, South, East, West. My idea was after I get the lat/longs I would need to determine if they are North, South, West, East and then offset them in the proper direction. Example: If you have a lat/long for a Interstate going South you would want to modify the lat/long to be offset to the left a little bit. That way it would actually sit a little off the Interstate to the left and so forth if you had one going North you would want to offset to the right a little bit.

Just an update on what I found so far....