This version is in the key of G.I've seen it Transcribed in Bm(D major) and tried 
to play it like that but it didn't sound right so I converted it into Em(G major)
Here are the chords I came up with.This is more like the live version with Tom Morello.

Intro:Em
Em                                   G               Em               D
Men walkin' long the railroad tracks,gone someplace there's no comin' back 
                                                 Em               D
Highway patrol choppers comin' up o'er the ridge,Man sleeps by a campfire  
        Em
under the bridge.Shelter line stretchin' round the corner,welcome to the new 
world order.Family sleepin' in the cars in the southwest,no home no job no peace no rest.
       C                                          G 
Chorus:Well the highway is alive tonight,nobody's kiddin nobody about where 
         D                                    Em                 D
It goes,I'm sittin here in the campfire light,searchin' for the Ghost of Tom
Em
Joad.

He pulls a prayer book out of his sleeping bag
Preachers lights up a butt and takes a drag
Waitin' for when the last shall be first and the first shall be last
In a cardboard box 'neath the underpass
Got a one-way ticket to the Promised Land
You got a hole in your belly and a gun in your hand
Sleeping on a pillow of solid rock
Bathin' in the city aqueduct

The highway is alive tonight
Where it's headed everybody knows
I'm sittin' down here in the campfire light
Waitin' on the ghost of Tom Joad

Now Tom said, "Mom, wherever there's a cop beatin' a guy
Wherever a hungry newborn baby cries
Where there's a fight 'gainst the blood and hatred in the air
Look for me Mom I'll be there
Wherever there's somebody fightin' for a place to stand
Or a decent job or a helpin' hand
Wherever somebody's strugglin' to be free
Look in their eyes Mom you'll see me."

Well the highway is alive tonight
But nobody's kiddin' nobody about where it goes
I'm sittin' down here in the campfire light
With the ghost of old Tom Joad ( repeat chorus again)]

With the ghost of old Tom Joad (4x)

Outro:Em