Wikipedia:WikiProject U.S. Roads/Alabama/Early numbering

A renumbering happened between the 1927 and 1928 maps. The State Highway Department was reorganized in mid-1927, so it was probably then.

Early auto trails[1]

• Bankhead Highway (SR-8), across the state via Anniston - Talladega - Birmingham - Jasper
• Dixie Overland Highway (SR-26), across the state from Columbus via Montgomery - Selma to Meridian
• Jackson Highway (SR-5), Tennessee via Florence - Russellville - Vernon to Mississippi
• Bee Line Highway (SR-7), Tennessee via Athens - Decatur - Birmingham - Montgomery - Troy - Dothan
• Florida Short Route (SR-1), Tennessee via Huntsville - Guntersville - Gadsden - Anniston - Talladega - Dadeville - Opelika to Columbus

• SR-1 (Florida Short Route), Phenix City to TN
  • Became SR-1, SR-11, SR-21, SR-1. In 1931, SR-1 was shifted back onto this route, the old one was renumbered as SR-37. In 1957, part of SR-1 became new SR-21, SR-38
• SR-2, Livingston to GA
  • Became SR-7
• SR-3 (Lee Highway), MS to TN
  • Became SR-2 (the western portion became part of SR-20 later and was changed back to SR-2 later)
• SR-4, Montgomery to Heflin
  • Became SR-9
• SR-5 (Jackson Highway), Mississippi to Tennessee
  • Became SR-34, SR-5, SR-13, SR-19, SR-18 (SR-34 and this portion of SR-5 now part of SR-13, this portion of SR-13 and SR-19 now part of SR-17)
• SR-6 (Craft Highway, AKA part of the Jefferson Davis Highway), Selma to Mobile
  • Became SR-5, SR-22 (southern portion now part of SR-13)
• SR-7 (Bee Line Highway), FL to TN
  • Became SR-1, SR-53, SR-3 (SR-53 rerouted around Banks later)
• SR-8 (Bankhead Highway), Guin to Georgia
  • Became SR-4, SR-48, SR-11, SR-4 (This portion of SR-48 is now SR-34 and this portion of SR-11 is now SR-21)
• SR-9, Loxley to Montgomery
  • Became SR-3, SR-12, SR-9 (one portion of SR-12 and one portion of SR-9 became part of SR-15 and one portion of SR-3 became part of SR-59
• SR-10 (Old Spanish Trail), Mississippi to Georgia
  • Became SR-12, SR-16 (or originally all SR-16? part of SR-12 not built until 1928 this portion of SR-12 became SR-16 later)
• SR-11, Banks to Georgia
  • Became SR-15
• SR-12, Linden to Luverne
  • Became SR-28, SR-10
• SR-13, Camden to Bay Minette
  • Became SR-11, SR-59 (this portion of SR-11 is now part of SR-41 and SR-21)
• SR-14, Seale to Dothan
  • Became SR-1
• SR-15, Montgomery to Georgia
  • Became SR-6, SR-26, SR-1 (one portion of SR-26 became part of SR-51
• SR-16, Union Springs to Georgia
  • Became SR-6, SR-51, SR-30
• SR-17, Samson to McKenzie
  • Became SR-12, SR-55 (one portion of SR-12 now SR-52)
• SR-18, Florida to Troy
  • Became SR-15 (this portion is now SR-87, SR-12, SR-9)
• SR-19, Geneva to Brantley
  • Became SR-27, SR-52 (this portion of SR-52 now part of SR-12 and SR-189
• SR-20, Florala to Georgia
  • Became SR-54, SR-12 (this portion of SR-12 now [SR-52 (AL)|SR-52]])
• SR-21, Clayton to Ariton
  • Became SR-30 (this portion of SR-30 now part of SR-51))
• SR-22, Ozark to Georgia
  • Became SR-27, SR-10
• SR-23, Montgomery to Monroeville
  • Became SR-3, SR-44 (this portion now part of SR-12
• SR-24, Evergreen to Brewton
  • Became SR-3
• SR-25, Mobile to Mississippi
  • Became SR-42
• SR-26 (Dixie Overland Highway),Mississippi to Georgia
  • Became SR-8 (one portion now SR-28 and SR-7)
• SR-48, Albertville to Fort Payne
  • Became SR-32 (this portion now part of SR-75 and SR-35)
• SR-53, Valley Head to GA
  • Became SR-58 (this portion now part of SR-117)

It doesn't look like the Brandon Highway - Montgomery, Greenville, Camden, Livingston, Meridian, MS - had a single number.