I would have to agree that metal plates and rail tracks are one of the obstacles that I'm very careful around and prefer to go around rather then through, especially when wet. Grates usually aren't bad unless the slots are the wrong direction and even then sometimes I'm still good because I rarely use tires narrower then 1.75" and often run 2.2" to 2.5" width tires so even some grates with the slots the wrong direction if the slots aren't too wide I'm still good.

I'd much rather have to deal with a chuck-hole even a monster size one then wet metal plates any day time or place.