I enjoy the plethora of triangles not only in the signs, but in the trees as well. I also like the way you captured a rainy day with the clouds, the wet pavement and the drops on the windshield. As I continue to look at it, the Yield sign seems to be saying, "slow down and take another look at what's around you."
I really like the colors in this image. And the triangles. The only thing that bothers me is the shutter should have opened a fraction earlier so the SUV isn't sliced by the sign. The other thing that bothers OCD me is the left sign doesn't seem vertical ;-) probably because it isn't in real life. Anyway - a really fun image with lots to keep my attention