[LasVegasMac]

I would have thought that it would have been over the tunnel, this is just right before it. May be the same thing.

Several of the Truck guys said the bumps were so bad that on the bounce, the undercarriage was putting grooves into the track.

Surprising though that none of the cup drivers that have tested here said anything about it.

Suspension differences?

[SouthTexas]

May be suspension or length of frame differences. Maybe the track sunk on both sides of the tunnel? :)