Will you have time to exercise him before you leave? Maybe take him for a LONG walk, then he'll be worn out and tired. Have you ever taken him in the car before? When I get Brody in the car, he just lays down - usually. He likes to look out the windows, but I think the motion of the car puts him to sleep. It will probably be the same with a train. I've heard of people on airplanes sneaking their dog into the bathroom - you might try this if he seems too hyper. Let him sniff around for a minute and get it out of his system. Do you have a store around you that sells pizzles or other long lasting chewies? Don't get rawhide because those are bad for dogs (I guess if you watch him, you could catch him before he swallows it). Brody will chew on his pizzle for almost an hour without paying attention to anything else. Maybe if you have something like this, it will keep him occupied. An hour and a half isn't too terribly long - I bet he'll be fine. Good luck!
