If you can't see the lights you can misread the signals. I live in Green Bay, WI and I saw most of the lights along my morning route to school were covered on n

If you can't see the lights you can misread the signals. I live in Green Bay, WI and I saw most of the lights along my morning route to school were covered on north/south lanes but clear on east/west. It was very very difficult to determine what light I had even using the east/west lights to rule out them having a green light. I had several close calls. Additional in Green Bay visibility was quite poor and the roads were dangerous. As for people missing the signals, I have a theory. Everyone I know determines if they have a red, yellow, or green light by looking at the color of the light. (Bear with me here.) I look at the position of the light instead of the color. I am the only person I know with normal vision that does this. From the number of people I've asked, only those with colorblindness read lights by position. I would assume this means most people look for a light to find a stoplight. Given poor visibility the lack of a visible light means people won't see the signal. Free feel to poke holes in my theory or ask me questions about my specialness with street lights.