I think that Ped Xing is a good sign. It's 'right-brain' language, as I was talking about above. Especially with a picture of a ped, as is usually the case. Same with 'Don't drive tired' and Texas's 'Drive Friendly.'

However, I think 'Opposing traffic has longer green' is a ridiculous sign. I suppose they are talking about an intersection where traffic going one way is allowed to move before traffic going the opposite way. (At first I thought it meant they had a bigger strip of grass somewhere.) I tried to think of a good sign for this, then decided that a flow like that is going to be dangerous no matter what sign they post, and they simply shouldn't allow it.

As for 'Change priorities ahead' - what does it mean?