Guitar,Piano,Vocal,Voice - Level 4 - Digital Download SKU: A0.1220584 By Emmylou Harris. By Daniel W. Flowers, James Hooker, and Nanci Griffith. Arranged by Jan Dobbins. 20th Century,Country. Score. 9 pages. CountrySongs4Choirs #816915. Published by CountrySongs4Choirs (A0.1220584). Gulf Coast Highway arranged in the key of D major for two voices, alto and tenor with piano accompaniment and guitar chords. This song is also available in arrangements for SATB choir (D major or Eb major) and SAA choir (D major).