It seems in turns 1 and 2 they drift up a bit then slow and reset themselves
in the curve. It makes it hard to drive close to them in the curve. They
slow down so drastically it's like their braking. Then the drop a bit and
proceed to drive out of 2. More of a annoyance than anything else but you
have to drive your car in a protective fashion in those curves. Takes away
a bit from the realism.
Sondog