a. I did not have an opportunity to try to figure out what you are doing. But it appears that the main table is "Signs". (Yes that's correct)
b. I cannot =figure out if a Sign can have multiple images. If that is the =case then you need to have a key in your images table.
(Yes, a sign can be many places. A stop sign can be at the corner or next to the bookstore. The signs table looks up which sign is at a particular location
c. Does a record in the sign table have a single image or multiple images? A sign in the sign table has a single image. A stop sign can only be a stop sign. Multiple signs can be at one location however each sign is treated as an individual record.
hth
I will modify the project and repost it
hoof
d. The balance of the tables is;
***many signs can be the same size, the signs table looks up the particular size
***many signs can be on the same type of post and the signs table looks up the various posts
***a road can many different signs, speed, stop, slow etc