In a message dated 2/16/2016 6:47:00 P.M. Eastern Standard Time,
emaglott3@GMAIL.COM writes:

I tied  to get my cat comfortable with vanagon travel by just hanging out
with her  in the van when it was stationary.  She was already 7 or 8 years
old  and never got comfortable with even that, much less driving.  I  think
you'd have to start young for the cat to really be used to it.   I have seen
cats casually riding in cars so it must be  possible.
Edward

years ago i had a tortiseshell calico who would climb into  peoples
vanagons when they came over to buy parts.. i had to tell them to  keep their
sliding doors closed.   one time she climbed into someone  westy, and went to
sleep in the back.  i got a call from the guy after he  had left saying "are
you missing a cat?"  she apparently was so content on  the rear bed  (and was
used to riding in a vanagon) that she didn't make  herself known till he was
like 30 miles away..   fortunately the guy  was kind enough to bring her
home... (i paid for his gas!!)