Wes Montgomery's "Road Song" is normally played in a Latin rock style. It is a straight-ahead AABA 32-bar form. The out-chorus has a 2-bar tag.
Nothing too unusual on the A sections. The bridge can suck you in though. It is a ii-V-I in Bb followed by a ii-V-I in Ab. But the tricky thing is the 4th bar of the bridge that sneaks in a ii-V in A.
The changes for the bridge are:
ii V I
Cm7 | F7 | Bbmaj7 | Bmi7 E7 |
Bbm7 | Eb7 | Abmaj7 | D7(b9) |