Opening (and post-bridge):

G-|--------------------4--4--------
D-|-----------------s5---5-5-4-2---
A-|---------2-0-2-3--------------5-(Repeat 2x)
E-|-0-0-2-3------------------------

Verse:
The walls are built up, stone by stone...

G-|----------------------------                   ----------------------------
D-|----------------------4-2-0- (Repeat 3x, then) ---------------------5-4-2-0
A-|---------2-0-2-3---3--------                   ---------2-0-2-3---3--------
E-|-0-0-2-3---------3----------                   -0-0-2-3---------3----------

Chorus:
And the train conductor says, take a break Driver 8

G-|-------------------------------------------------
D-|(0)----------------------------------------------
A-|----3-3-2/3-5-5----3-3-2/3-5-5----3-3-2/3-5--3-2-
E-|-------------------------------------------------

But it's still a ways away...

G-|------------------------------
D-|------------------------------
A-|---------3--------------3-----  (Repeat as many times as neccesaray)
E-|-0-0-2-3---3-2-0--0-2-3---3-2-

Break:
A way to shield the hated heat...
(Play in a very countrified manor)

    Am               C            G             D(real fast)
G-|-------------------------------------4/5---------------------
D-|-------------------------------5-5/7-----7-5-------9p7-5-----
A-|-----/3-5-7-5-3--3-3/5--3-3/5----------------5-5/7-------7-5-
E-|-5-5---------------------------------------------------------

   Am             C             G              D
G-|-----------------------------------4/5-------------------
D-|-----------------------------5-5/7-----7-5---------------
A-|---/3-5-7-5-3--3-3/5--3-3/5-----------------5-5/7--5-5/7-
E-|-5-------------------------------------------------------(Opening riff)

End on open E.

Backing vocals: If you can't pick these out, you must be deaf.  There's the
"Driver 8" over the "Take a break Driver 8" part, and the echoing of "But
it's still a ways away" over the chorus.  Very easy to work in.