I'm new at this, but these chords sound good to me  
(corrections welcome, of course). 
 
Intro:  D  G  D  G 
 
D                           G 
I got in my car and let it roll 
D                           Cadd9 
Headed down a new patch of road 
D                       G 
Didn't know how far I'd go 
D                              Cadd9 
Just got in my car and let it roll 
              D 
I just let it roll 
 
D G 
 
 
Smoked my last cigarette 
But I ain't stoppin yet 
I'm gettin as far as I can get 
Smoked my last cigarette 
 
CHORUS: 
        D                  G      Cadd9 
Tell me why do I still see you 
         D              Cadd9 
Tell me why do I still care 
         D                  G      Cadd9 
Tell me why do I still feel you 
            D                    C 
Like you're hear whisperin in my ear 
        Cadd9                     D 
Tell me why....why do I still want you 
 
Intro 
 
I ain't lookin in the rearview mirror 
Watchin those miles disappearin 
Yeah, the future ain't much clearer 
But I ain't lookin in the rearview mirror 
 
CHORUS 
 
Intro 
 
I've got my eye on that horizon 
The moon is down the sun is risin 
Am I livin or am I dyin 
I've got my eye on that horizon 
 
CHORUS