Jackson Browne's "Running on Empty." Great musicians and great songwriting. It would be perfect road trip music even if all the songs weren't about touring/travelling.
Forrest Gump soundtrack... it's long enough to cover a trip from LA to DC. If that's not yor cup of tea, maybe the soundtrack to Beaches or Slayer's greatest hits.
Waiting for Columbus - Little Feat
Pronounced Leh-nerd Skin-nerd - Lynyrd Skynyrd
Second Helping - Lynyrd Skynyrd
Muse - Black Holes & Revelations
Outkast - Speakerboxx/The Love Below
Greatest Hits - Stevie Ray Vaughan
Greatest Hits - Tom Petty & the Heartbreakers
Joshua Tree - U2
Greatest Hits - ZZ Top
Bill Hicks - Rant in E Minor
Bill Cosby - To Russell, My Brother, Whom I Slept With
Jim Gaffigan - Beyond the Pale
Chris Rock - Born Suspect
Jerry Seinfeld - I'm Telling You for the Last Time
Steve Martin - Comedy Isn't Pretty
Guns N Roses - Appetite for Destruction
Tom Petty & the Heartbreakers - Greatest Hits
Lucinda Williams - Car Wheels on a Gravel Road
Cross Canadian Ragweed - Purple
Drive-By Truckers - Southern Rock Opera
Robert Earl Keen-Picnic
Darden Smith-Little Victories,Deep Fantastic Blue,Field of Crows.
Pat Metheny Group-"As Falls Wichita, So Falls Wichita Falls".
Marc Johnson-Sound of Summer Running
Townes Van Zandt-Road Songs
The Sundays-Static and Silence.
Not knowing what kind of music you like, I'll second comedy albums as a great way to pass the time(providing you arent riding w/ little ears)
I'm going to colorado next week and I'm bringing some comedy albums I havent heard in a long time.
Steve Martin-Lets get small, Comedy is not pretty
Mitch Hedberg-Strategic grill locations
Carlos mencia- Take a Joke America
Robin Williams- Reality, What a Concept