Water plane tearing

I have a water material that has this annoying tearing (I think that’s what I’d call it). My plane has about 60k polygons, I tried using a plane with less, that didn’t solve the problem. The tearing occurs at the top and bottom of the screen. You can see the tearing at the bottom here in this picture.

Also: anyone know how I can fix my opacity? you can see that the water is opaque at the edges of some of the lane line segments but not others, kind of ruins the effect.

I’m having the same problem! Would love to know a solution, really annoying seeing the water like that.