...so what happens if it hits a Moose....?
You end up with a very dead moose.
At that speed... the windshield will probably be covered with blood, and the nearby carnivores will have a feast. And that is only if the Moose hits square, and is laying on the 'track'. If he's standing up, he will be shot over the 'cockpit', bouncing off the roof of the last car. The passengers might feel a slight 'jolt'.