Well..... i get the highway question quite often.... but i think i get asked other questions a lot more often.
Along with the typical questions like how fast does it go, is it hybrid, and the even more typical "How much do they cost?"..... i think i'd have to say the most frequent question asked is "Do you feel safe in it?".
Peter: no. last i checked, there's quite a bit more danger on main roads and back roads than there is on highways. highways the majority of what you have to watch out for is other vehicles traveling the same direction. On main roads and back roads, you've got deer, cross traffic, oncoming traffic, same direction traffic....
People seem to tend to just ask if i feel safe while driving it. rarely do people specify on the highway.