
Yep Reddoor....... thats pretty much it.
Reward for being quiet, ignore everything else.
Also making the car a much more normal and boring place to be will help, id suspect its a combination of exciting things giong on outside, and the fact that the car usually m eans going somewhere exciting.
I did have the (mis)fortune to once travel regularly with an OES who barked in the car. He barked once he was sure we were going to the park..... if he thought we were going to the park and we passed the turn off and went to the supermarket instead he had 'EH, WOT' written all over his hairy face! hahaha.
Once you get over the 'car is exciting' part, move on to 'car moving is exciting' by going to realllllllly borrrrrrring places.
Also, cover the crate, so nothing can be seen, then you can easily get to do the 'car goes to boring places' by going round the block and home, etcetc.
Fortunately none of my own dogs bark in the car, since i dont own one, if they did id have the devil of a job training them out of it, adn the thought of them doing it on the bus or train is awful!!!!!
Em