On the ramp coming off of the Mass Pike in West Newton heading west on Route 16, there is a hole under one of the straps on the right side of the exit rounding the curve. I have learned to avoid it either by staying over far to my right, or by going into the first left lane, but it is very jarring on my car, when I forget that it is coming up. I don't know who would take care of this, but it has definitely been a problem for my car, and would be for others, especially smaller cars.