Several people have commented on the sashing fabric in A Few Good Scraps, and I've used that several times, so here's another one.
This focus fabric was of silly license plates. I used the wavy fabric because it looks bit like the lines on a road when you've been on the road for too long. Then, in the setting triangles, I made little nine patch traffic lights. I thought this would be a fun quilt to have in an RV, thus the name :)