Mmmm, good topic! There are quite a few songs that are better to listen to in the car than in other situations. The passing motion of all the things around you kind of serves as a real-life music video of sorts

Some of the ones I like, mostly classic rock since I especially like listening to the aucoustics while driving:

"Runnin Down a Dream" - Tom Petty

"Two Tickets to Paradise" -Eddie Money

"Free Bird" - Lynyard Skinner

"Hold the Line" - Toto

"White Wedding" - Billy Idol

"Eminence Front" - The Who

"Viva la Vida" - Coldplay

And now that I think of it "Clocks" would be a good song for the car listening Neptune, I'll have to do that sometime